Pipes and Cisterns - Shortcuts & Tricks for Placement Tests, Job Interviews & Exams

Crack the quantitative aptitude section of Placement Test or Job Interview at any company with shortcuts & tricks on Pipes and Cisterns. Extremely helpful to crack entrance exams like MBA, Banking - IBPS, SBI, UPSC, SSC, Railways etc.
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#PipesAndCisterns #QuantitativeAptitude #PlacementTest

[@CareerRideOfficial]

Practice Questions on "Pipes and Cisterns" available at: www.careerride.com/mcq/pipes-and-cistern-quantitative-aptitude-mcq-questions-21.aspx

[@sumanthale]

please make a video on geometry

[@jolKOBI]

Can you plz check Q no 6 again? It seems logically flawed. Though its quite okay with mathematical equation I found it problematic in real life scenario. The tank would be filled at 9:19am. So If you wait to open the Valve R at 10 am the tank will overflow.

[@vasumavani1280]

@@jolKOBI Agree! From 10 it will be full and then on R will empty it and p,q will oppose it. If calculated by the method given in the video, tank need extra storage.

[@ಪೂರ್ಣಿಮನಾರಾಯಣಸ್ವಾಮಿ]

Sir can you please do video on calendar problems?

[@PrathameshDhavale]

@@jolKOBI right

[@RSang007]

I find only career ride, feel free to learn and dear Sir give thorough teaching, others are only for already brilliant students, so these are the best tutors who genuinely care about the majority of us students.

[@saitanigam6570]

Thanks for spreading knowledge,I found other helpful channels too.

[@017blessystejil.p6]

Can you pls share names of those channels pls ENGLISH medium@@saitanigam6570

[@hisfvrt]

"Simply invert" is the only thing that's keeping me alive

[@tusharvyavahare9229]

And 1hr rule😌

[@22_nareshkachori68]

Me too

[@otter2042]

😁

[@miss_optimist9994]

Yeah

[@chakrababukanda2231]

This lecture is completely mind blowing... I am telling u guys... I have never seen anybody like this sir who explains everything in detail....!!

[@CareerRideOfficial]

Thanks for the kind words, Chakrababu! Do share the video with your friends and family , if you have found it helpful. Stay connected :)

[@sunitha2743]

That too different kinds of problems

[@newsmusk6120]

@Daredevil your answer is 33/4 minutes. Is it so?

[@kvsalahuddin5]

31:30 6th question..Tank's capacity is fixed..till 10 am,it has been overflowing..so to empty the tank we have to consider only that fixed capacity of the tank.. I am doing it in a different way..efficiency method..in which i got tank capacity as 6 units..but till 10 am tank got filled my 11 units which means it was overflowing so when R is opened at 10 am,we dont need to consider the overflow,just tank capacity only.. ie 6/combined efficiency = 1 hr 12 minutes And answer is 11:12 am

[@mananbhasin32]

All they do is maths... thanks for the validation.

[@_SomyaY]

even i was about to comment this

[@ArnabGhosh-z5z]

even akshay kumar sinha was telling that.

[@avigarg7859]

Sir, your channel is one of the most user-friendly. The communication in the videos is very simple. I like watching videos at 1.75X and 2X speed. However, the information is excellent.

[@019saivikram5]

Carrer ride channel I am greatly thankful to students free of cost clarity concepts explaining thanking you so much .

[@Infoentertain555]

The concepts that u r teaching is so good, I thank you for sharing the indepth concept clarification

[@godwincrasto3709]

In the 6th problem, at 8 am tap P is opened(2 hrs before all three are open together) and needs 1.5 hrs to fill the tank(ie. P alone can fill the tank in 1.5hrs + half hour water is wasted). At 9 am tap Q is opened(1 hr before all three are opened together) and needs 2 hrs to fill the tank but since P can alone fill the tank, lets consider all the water of tap Q is wasted. Now at 10 am tap R is opened( needs 1/2 hrs to empty the tank). At 10am the tank is full and all 3 taps are open together. Total work done by all 3 taps is 2/3 + 1/2 - 2 = -5/6. So when all 3 are open together they will empty a filled tank in -6/5 hrs ie. 1.2 hrs(1hr and 12mins). Therefore, the tank will be empty at 11:12 am.

[@kartikaychopra5048]

My point exactly

[@dimplesharma8093]

Very nice set of questions...exactly what is required for cat. Thanks thanks a lot for providing a material with great solutions. Please keep posting more and more such videos.

[@orycroft2020]

Thank you for patiently and thoroughly explaining these maths concepts. Hoping this will help save me 😭...More power to your channel💪🙏

[@pratikpatil4880]

My mother told me , at night I was shouting ..."Simplyyyyyy Invert"

[@santhoshsiva281]

😂🔥

[@Anushaaa_]

😂😂

[@sir328]

@sanjureddy pallae 🤣🤣🤣🤣🤣🤣🤣🤣

[@varaddeshmukh1137]

Bro.... You diiiiiid great..😂😂

[@varaddeshmukh1137]

He sometimes get annoying 🤣🤣

[@tannupanwar1984]

Yesterday i watched your time and work video today watching this only from single video I'm doing almost all sums you're such a great teacher

[@purushujagana310]

When you say it's very very easy we will confident enough to solve that problem tq sir 🙏👏👏

[@ketakis.4887]

Thanks a lot 🙏Your videos are very helpful. Just one suggestion that please try to tell shortcuts to solve these questions for competitive exams. E.g. In the last question,we can directly find the amount of time required more. In 2 hours, pipe R emptied 2*1/30 part of the tank that is 1/15th part of tank. So P and Q in one hour can fill 5/30=1/6th part of tank.So just find time required for both of them to fill 1/15th part of tank. 1hr 1/6 ? hr 1/15 Cross multiplying you get 6/15 hr = 6×60/15 min =24 min

[@mansimallick6502]

Very well explained ! The way of teaching is so so good that it helps me to solve more and more difficult ques very easily.Your concepts are so good.whenever I have to do any question from any topic,I refer to your video first,it just also give people a great revision from your videos. Thank you so much for giving us those videos on quantitive aptitude.Make more and more videos on logical reasoning also.God bless you sir !

[@rakeshs3617]

Sir in ur quantitative section please add logarithm problem section also Explaination of all topics by u is amazing Thank u sir🙏

[@juliakujur7334]

Sir you are really superb ❤❤ You explains each nd every concepts so clear 😍😍 Thank you so much❤❤❤❤

[@ramasitanagidi8645]

For the 9th problem P and Q can fill the tank in 6 hours And R empty in 30 hours for 2 hours it's work done is 1/15 So P and Q have to fill this 1/15th work So (6/15) *60mins Ans 24mins

[@amitbale3858]

This is what I was also confused about...sir has nt considered the lcm of 3 and 2 that is 6 during problem solving

[@FearlessStar33]

Sir ki teaching is SIMPILY GOOD!

[@h517haritha3]

Iam preparing for Infosys,tcs placement exams. for apptitude round this video was Helped me a lot.

[@swapneelsahu9440]

There is a *very important and SCARY lesson* to be learnt with Q6 at 26:10 and the lesson is that *never use formula without understanding the complete logic behind it AND common sense and logic always prevails over formulae* because the formula used has been applied correctly but the answer is completely flawed , and thus this is what happens when students use formulae over common sense and logic The correct answer is 11:12AM and NOT 12:12 PM ( the working is pointed out in the other comments here , but i just wanted to bring to light the utmost importance of common sense and logic with respect to formula ) but discarding this, yet another excellent video to learn about aptitude !

[@rehanshah2091]

At 29:51 I think the solution ignore the total capacity of the tank. P can "fill" the tank in 1.5 hours and it was opened for 2 hours (8 to 10) I think the question is then rearranged to "How much time it will take to empty the full (overflowed)) tank while P and Q filling it after 10 am". i.e., =1/(1/2) -1/1.5 -1/2 =2-(7/6) =5/6 th part =6/5 hour = 1.2 hour but, I am getting 11:12 am and not 12:12 am.

[@swapneelsahu9440]

EXACTLYYY, even im getting this EXACTTT solution as you. ie. even im getting that, the tank gets emptied at 11:12 am , and not at 12:12 pm

[@atharva808]

reading this ,,, i am geting a feeling of releif that "i am not alone" . thanks bro

[@mahadevan5756]

3 sum solve by using another simple method also bro Formula =XY/Y-X hrs 24×36/24-36=864/12=72

[@Mkapezz]

Shut up😂

[@bakavishal2837]

Just an advice from me to everyone asking for shortcuts.... There are no shortcuts you just need to practice them than only you will get it..... You guyz asking everything in shortcuts there is no such thing in classes to they do same way.... So just practice them

[@siyaa326]

The simplyyy invert is even more funny at x2 speed 😂 Good explaination sir. Thank you

[@Sotarogojo]

Exactly

[@nitinchoudhary5507]

U r the best teacher in explaining the things. Loved the way u explain the concepts and i understood all the concepts very clearly. Hats off to you sir. Keep it up!😊😇

[@riteshmandal4240]

In Q.6 ,If the tap P is opened at 8am,it will fill 2/3 amount of tank. Now at 9am,Q is also opened. now upto 10am the total tank filled is 11/6, which in Practical life states that the tank is overflowing. But now at 10am , R is opened which empties the tank in 1/2 hour. so isn't it right that the tank empties in 2:30 hours that is at 10:30am. Although, I understand that this is just an example that you have drawn to make the concept clear in these type of problems. For different numerical value it must have also covered the practical problem. But if such question is asked then what is advisable either to go with mathematics only or to keep in account for the practical overflow and stuff. Btw I love your Teaching style.

[@pavan21216]

i tried to do it in my way..iam not getting answer..which he got 4 hour 12 minutes here....

[@akshaythakur8376]

sir in question no.-7 tap Q's time you have found to be equal to 18 hrs, now by that value if we try to find the time taken by P tap then it will come out to be 36 hrs according to your equation which is not possible since the tap P can fill at twice the rate as tap Q. In my view the equation should be Q=2P and not P=2Q. sir think about it...............then the answer will change

[@DACS_GaganaSN]

Yeah, it should be Q=2p

[@KrishnaKPandey]

Exactly. That's what I was looking for. No worries. Just a mistake.

[@nupur4849]

NO coz it's a rate and not directly time

[@Shreekant12345]

U changed my perception of CSat is tough to I can solve by ease(With technic).. Thank you ❤️

[@gokulraj5453]

Congratulations sir the video is good and super But have a doubt in Q5 u said B=5A (B slower 5, A=1m B=5m) And Q7 :tap P can fill the cistern at twice the rate of Tap Q so considering time Q is slower (P=1min then Q=2min) So Q=2P Pls clarify my doubt

[@usermeenasingh1978]

Thank u very much sir. Just because of u I think that this topic is easy😇

[@CareerRideOfficial]

You're welcome, Meena. Glad that you found the content useful. Do take a look at our other videos too :)

[@varunreddy7412]

question 6 is in correct. bcz at 8 am if pipe p is on and 9 am pipe q is on then tank will flow.

[@ritutiwary9275]

OMG thankyou very much such a very informative video thank you sir,I was literally unable to solve any from this chapter but your video clears my concept and also how to solve it's questions to the toughest level

[@nagasirisha7694]

So nice of you sir 🙏🤗🤗🙏 thank you so much for your support

[@Bunny-yn5wd]

The lcm of 38 19 and 133 should b 266 not 133

[@nirajmeshram4]

The way teach sir just awesome....

[@sudhasingh135]

Sir very nicely explained... thanks a lot for such videos but i have doubt in one Question: In Q6, they haven't mentioned that pipe A is closed when pipe B started, so does that didn't mean that after 1 hours both A and B is open... Please consider my doubt and reply 🙏

[@gopavaramsaimadhuree520]

Thank you so much Very good explanation.Easy to understand

[@Nithya340]

Thank you sooo much sir this is the first video i am seeing from ur channel after half the video i was able to solve the remaning ques of yours easilly by pausing Though i made minute mistakes i feel like i have understood the concept very well. Now i am going to watch your other videos. Thank you once again sir.

[@paragroy5359]

Nice explanation sir....but in question 6 at10am the tank will be overflowing so at 10a.m the condition is that we have opened all the three taps and the tank is filled up so the answer is 11:12 am

[@VladimirZhenko]

I also felt at 10:00am tank will be over flowing- so actually combined rate will come to force at 10am 2/3+1/2-2/1= (7-12)/6= -5/6 50 mins from 10:00am that is at 10:50am.

[@bhuwandahal7583]

yes u r write...i also felt that same

[@spurthichadharam9144]

Thank you I think we can shall may vphv understand the importance truth and value of pipes to carry water and the stresses they undergo and use natural materials like bamboo rosewood etc., for making them at any cost that prevent conduction widening and narrowing that result in repairs........................

[@sathvikram1881]

Ur explanation .... Super sir...really I addicted to ur teaching...sir

[@monalisutradhar468]

Thank you for easy concept of pipes and cistern

[@muruganmech2037]

Your explanation is very easy to understand. Thank you...

[@arafatsheikh4178]

Best channel for learning aptitude ❤️

[@soumyasrivastava127]

Sir......no words 👍👌

[@chethanfilmcity3791]

Ur explaination is very easy to understand dull students also pass the exams

[@CareerRideOfficial]

Thanks for your feedback, Chethan! Stay connected :)

[@AniketDahake52]

for Q6 tank get fill before 10 because of both the tap then water will overflow so we have to start the q after that like at 10 we open the tap R to empty the and then its filling again because of P and Q and like that ans willl come as 11.12 am

[@kewtomrao]

For problem4: In 1min, m can fill: 1/22.5 in 1min, N can fill 1/15 Let N run for x mins. Hence it will fill: x/15 M should run for 18mins Hence it will fill, 18/22.5 Hence 18/22.5 + x/22.5 = 1 because entire tank is filled. Hence x = 3.

[@418aditya3]

x/ 15 not x/22.5

[@swatikadambala7494]

Thank you so much sir for all tricks and shortcuts.... 😊

[@akshayhanmantikar1875]

You explain it really well. Thanks for the video. Please upload videos on other topics as well. Thanks in advance.

[@CareerRideOfficial]

You're welcome, Akshay. Did you see our Quantitative Aptitude playlist? It carries all the chapters. Hope this helps. If you have found this video useful, do share it with your friends and family. Stay connected :)

[@ShivamSingh-jx1on]

sir i like yr vidio every youtuber is confusing by making 2-3 question in one vidio by part 1 part-2 like that but you complete one chapter in one vidio its makes student easy to understand.....very nic sir its help me lot..i will watch yr all vidio for my exam because yr full vidio is nt making me confuse....subscribed yr channel

[@CareerRideOfficial]

Thanks for your feedbac, Shivam! All the best. :)

[@arrchanasuresh7518]

For ques 5, there is a formula nt/n^2-1. Where n=5, t=32.

[@DACS_GaganaSN]

Tq

[@mr.p2665]

No

[@CODERSNEVERQUIT]

All questions can be solved using single formula that is work= men x days

[@QAYEESIMRUL]

Receive my Love and Respect brother ❤️

[@pratapmondal4994]

Thank you so much sir for this very helpful lectures.

[@sayalibhagwatkar5997]

Sir, due to your easy explanatiin i got placed in fendhal☺☺ thank you soo much sir

[@CareerRideOfficial]

That's such a great news, Sayali. Thank you for coming back to share it with us. All the best!

[@abhishekseth8147]

shortcut for 6th question is (1/1.5)*1+((1/1.5)+(1/2))*1+((1/1.5)+(1/2)-(1/.5))*t=0

[@niranjangowdacm]

Sir please make videos on calendar problems. The most difficult one's. As usual please make it easy for us 🙏🙏🙏🙏🙏🙏🙏🙏🙏

[@CareerRideOfficial]

Calendar Video: kzbin.info/www/bejne/panGZXpnadOsi7s

[@awatekeerthi6239]

Really appreciate the way you teach sir!!!

[@PGSUBHAMKUMAR]

Conceptually Explained.....Thanks a lot Sir.....

[@anilmarken412]

Sir question 6 solution is wrong from my point of view. What you have done that is based on assumption that when both P+Q were on then there is no water wastage till 10AM .See, Till 9 AM, tap P will fill 2/3 rd tank and after that both P+Q are working therefore they will fill remaining 1/3 of the tank in just 5.42 minutes therefore once tank is filled after that even though tap P& Q are on but water will be wasted therefore at 10AM tank will be full only not more than that. Now Tap R in 1 minute empty 1/30 tank(in minutes) and tap p+q fill 7/360 tank in 1 minute therefore tank will be empty in 72 minutes i.e. at 11.12AM tank will be empty. Your solution was based on the assumption that till 10AM no water was wasted. Please reply whether i am right or wrong.

[@mystican209]

looking for someone saying question 6 is wrong ... i think i got one!!! yeah u r right!!

[@jayrathod2172]

Same Brother I was also looking for this kind of comment that Question 6 is wrong. True Ans Is = 11 hour and 12 minute

[@SantoshYadav-bz9iz]

QUESTION no. 6 , solution is wrong(tank will be overflown by 10 pm u have to exclude it ) , it is very sad ,that no one noticed it yet you have put lots of efforts ,sir , and I'm very grateful for that, but please correct that mistake

[@mayureshjoshi4616]

thanks a lot for putting up the content for free it's really awesome of you , keep it up !!!

[@raghavs199]

when u say its easy , whatever the difficulty of problem it feels like easy , thank you.

[@CareerRideOfficial]

Yes, Raghav. That's how our mind works :)

[@hrushikeshwasamkar2423]

Thank you for your efforts

[@jeninraj7843]

In question No.6 shouldn't the answer be 3hr 12min , because by 10:00 am the tank will be completely filled now the 3 taps are open and then it will only take 1hr 12 min to completely empty the tank. So a total of 3 hr 12min is needed.

[@avinashkumarsingh2007]

right.... The question has been solved in an incorrect way....

[@Mybasket503]

Amazing sir. Thank You this helped me alot.

[@saurabhkardam2112]

Sir it take more time for solving this type of question? Like question no9

[@rashmi6222]

Awesome... Full concept covered flawlessly

[@CareerRideOfficial]

Thanks, Rashmi. We have got some interesting videos on Logical Reasoning, Resume Writing, HR Interview and Interview Q & A on core topics as well. Do take a look. :)

[@AnanyaChauhan-o3q]

such a great video, can we pls get the name of this excellent teacher pls

[@venkadeshg9447]

Really good illustration

[@durgeshsingh6380]

Excellent Teaching Style

[@sonu-wh2ld]

Thank you sir...may god bless you

[@VladimirZhenko]

I also felt at 10:00am tank will be over flowing- so actually combined rate will come to force at 10am 2/3+1/2-2/1= (7-12)/6= -5/6 50 mins from 10:00am that is at 10:50am.

[@letseatjamnagar]

Shouldn't it be 11:12 am ?

[@letseatjamnagar]

You are adding efficiencies.... So you should inverse the final answer to get time....

[@suhasijain9376]

amazing way of teaching sir

[@bhavyasharma448]

Thank you very much for the video! It have made maths quite easy to understand. Could you please upload videos on arithmetic progressions and geometry.

[@PMSSusmitha]

The concept understand clrly, bcoz of ur teaching👍

[@jangkholenbaite7567]

Some of the comments do not agree on the Answer of 6th.question, but I do agree,I don't think Sir is wrong,, please verify your answer who don't agree

[@kvsalahuddin5]

It is wrong

[@bhagyaa38]

Perfect Explanation !! Thanks a lot 👍

[@somus7655]

Thank you very much for your service

[@laganpreet6982]

Sir your videos are really simple and hence helpful. Thank you. But sir.. the practice mcq's hav solutions that are solved by tough methods and too different from your method. So it is confusing smtimes

[@CareerRideOfficial]

No. Scroll down the page and see the questions, listed below the video on the page. (The ones with the numbers against them).

[@sajidanausheen5715]

Good explanation Sir. Thank you for uploading such lecture.

[@Anas_Ansari421]

22:16 Q4) I think the Qs is like this..both the pipes M+N r opened and after some time N closed and only M open for last 18min to full the tank...so here after calculating pipe M for 18 min and then we have to find out M+N for 1min and calculate for M+N for 45/22.5 min here..where u can find how much time N closed... I think u got my doubt....plzzz reply sir

[@Anas_Ansari421]

Make 4.5/22.5= 9/45=1/5 so dull student like me can do cal. fast

[@surekharani550]

awe some training, clear, clarity , just shotting an arrow

[@CareerRideOfficial]

Thanks for the kind words, Surekha. Do share the video with your friends and family & join us in our mission to make good content available to all. Stay connected :)

[@chemistryman6053]

thankyou so much for good quality content

[@gururaj3165]

21:50 There both pipes are opened initially so (1/22.5) + (1/15)

[@AmitCodes]

In question 6 the tank is completely filled before 9am. So the correct anwer will be 11.12

[@kvsalahuddin5]

Yes you are right...tanks capacity is fixed..till 10 am..it has been overflowing..so to empty the tank we have to consider only that much capacity of the tank.. I am doing it in a different way..efficiency method..in which i got tank capacity as 6 units..but till 10 am tank got filled my 11 units which means it was overflowing so when R is opened we dont need to consider the overflow,just tank capacity only..

[@guidedmissile4154]

My doubt is in question 4 when N is closed than we shoud assume {(1/22.5)+(1/15)}x instead of x/15 as question says both open simultaneously and than N closted after some time

[@gowrisankarc1049]

Use this formulae 1- ( tnk full / first tank) × second tank let me know if you got it !

[@vamseevami9081]

Tq sir I understood this because of u sir. Once again tq sir

[@deepthimols.s2417]

Thank you ...really well explained 👍

[@kavishthisside16]

Simply Invert..😅😀😀😊 Well.. Thank you Sir. 😀

[@abhinjoby7107]

Could someone suggest a book on quantitative aptitude for bank exams that covers all topics with shortcut methods? All the books I have follow the old conventional method.

[@lavanyameemjuru1303]

Sir please explained some more difficult problems that to new models

[@prathyush4039]

Q.9 p&q take n time to fill & R opened for 2 hour put on eqn n(1/15*1/10)-2/30=1 get n=6.4h if R is not open eqn (1/15*1/10) P&q take 6h waste of time =0.6 h =24 min

[@manohar.n9482]

Waste of time=0.4 h =24 minutes

[@amanchander7837]

Thank you, sir, for your efforts.I really like your videos. They are helpful !!

[@awakenyoursoul4574]

See very easy 😃 simply invert... 🙏

[@gusionfusion1073]

sir please use a good mic because sometime your voice echos too much and it becomes hard to get the part ...... overall love your teaching style

[@sakshisingh318]

Thank you sir😊it's really very helpful