TSD Linear Tracks 3 | CAT Preparation 2024 | Arithmetic | Quantitative Aptitude

CAT PREPARATION 2024 I QUANTITATIVE APTITUDE PREPARATION for CAT 2024
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[@ajaysajeev007]

AP/HP method taught by you in another video is more efficient i think. 2nd question can be solved using below method: Let initial speed = S Initial time = T First we are increasing the speed by 10km/h. And in the next case, we are further increasing speed by 10 more kms. Therefore, the three speeds are S,S+10 and S+20 Now you can observe that Speeds are in AP. Therefore we can conclude that Time will be in HP. Initial time is T. In the first case, time is decreased by 1 hour. And in the next case, it is decreased by another 45mins. So the three time entities will be T,T-1 and T-105/60 Now as they are in HP, we can use the formula of HP to find the middle term. Applying the formula B=2AC/A+C, we can find T=60km/h (1st question can be also done in similar manner) Hope this helps someone looking for AP/HP method!

[@applepie4891]

Yeah....but the calculation will be tedious after that

[@yogeshr1998]

Thanks for the awesome explanation. Just a small typo, in the end, it's S=60km/h (not T=60km/h).

[@rohitagarwal7466]

Hey plz tell how 1st question can be done using ap hp method

[@rohitagarwal7466]

@ajaysajeev007

[@jagrit77]

@@rohitagarwal7466 no

[@ramisharts1738]

in 19:19 , why we must use ratios to solve the ques further, it is increasing the complexity of the solution, my solution: once we have found the original speed = 12 km/hr, use the equation for Speed increase and time decrease,i.e t = ( s - s2) / s2 so, t = 12 - 2 / 3 = 3.33 hrs or 200 minutes and, original distance = 12 * 3.333 = 40 km(approx) , much faster this way.

[@arpitamate2919]

I was thinking the exact same thing

[@Sarah-uc9xn]

That's how I did it too

[@ishajain5828]

Thank you so much Sir for making all these major concepts easy....... Now I feel confident in Arithmetic.

[@arusheesharon]

Sir at 12:05 it will be S-S2

[@aditibhattacharya8843]

Excellent way of explaining tough concepts in such a simple manner. In the end, he mentions the next video, can anyone please help find the link for part 4 of Linear Tracks topic. I can't find it anywhere.

[@rupesh7566]

Same problem

[@Samrat-Singh-Maurya]

Unexpected Sir from anyone who provides free content and very helpful vdo for me ❤ you a lot sir 🙏

[@adarshramesh3140]

In the first question we can solve for time by using the formula of case 1 T=((s1+s)/s1)*t1 But we are ending up with different answers. Can anyone help me out.

[@___DannyBoyka]

No bro , answer will be same... using this formula we get T = 10/3 hrs, which is same as 200 mins.(i.e.200/60)...... convert 40 mins to hrs

[@UPSC__Concepts_9]

Amazing concepts make questions so simple ,now i am doubtfull , i am preparing at correct level of difficulty or not 🤔

[@vivekbasani6704]

Thanks for all your Free Content and also for very great explanation

[@yash2614]

Thank you sir for taking the time to explain concepts in depth, your videos are really helpful.

[@shivamdrolia600]

In the cases explained there are errors in case 2 and case 3 that are when t2 is taken the formula explained is t2=tS2/s+s2 but the correct one in denominator is S-S2

[@prayasdivlogging6925]

final equation kyaa aata hai ????????

[@options_daily]

@@prayasdivlogging6925 same equation hi rhega....but instead of s+S2 it is s-s2

[@ashishkorat8009]

Amazingly Explained. Thank you, sir. Your videos are very much helpful to me and many students like me.

[@mbagirl03]

16:08 i'm little confused regarding difference of time ...in some questions both time will get subtracted and in some it will added..

[@piyushmundra7511]

I think its better to use the concept of inverse proportion i.e. n/d increase = n/(d+n) decrease to solve the questions. This will allow us to not make any mistakes while applying the formulae given.

[@sachinbhuvanes4000]

I'm also pondered about that.... but for applying the n/d method we need the question to be asked with increase or decrease in fraction (eg: 2/3rd frm original TSD).. but here in this model they only gave the exact increased speed so, ita better to use this.

[@vaibhavkatthil1552]

Even the formula derived by sir can be directly calculated though inverse proportion concept.

[@vaibhavkatthil1552]

If the increment is S1 than the proportional increase will be S1/S so if s increase by s1/s than time will decrease by s1*t/s+s1

[@kalpanakumari9592]

Thank you sir for this beautiful explanation

[@ritikagaddellu7938]

12:55 suddenly I got shocked listening my name🤣🤣.. I thought this is live lecture or what

[@ayushdhangar486]

lol

[@yashsinghparmar6188]

at time stamp 12:45 it will be s-s2

[@prateekbirthal9649]

Just a typo, final result is correct

[@uditvikremsingh3178]

Best channel ever❤️

[@kishankumaragarwal7768]

Both the questions can be easily solved by AM HM concept which you taught.....

[@himanshumodi7840]

How to solve 2nd que by ap/hp ?

[@harishbanda1513]

how for the 2nd ??? can you explain

[@ajaysajeev007]

@@harishbanda1513 Let initial speed = S Initial time = T First we are increasing the speed by 10km/h. And in the next case, we are further increasing speed by 10 more kms. Therfore, the three speeds are S,S+10 and S+20 Now you can observe that Speeds are in AP. Therefore we can conclude that Time will be in HP. Initial time is T. In the first case, time is decreased by 1 hour. And in the next case, it is decreased by another 45mins. So the three time entities will be T,T-1 and T-105/60 Now as they are in HP, we can use the formula of HP to find the middle term. Applying the formula B=2AC/A+C, we can find T=60km/h Hope this helps!

[@satnamsingh-lh7iv]

@@ajaysajeev007 bro can i get your number plz or email just want to clear some doubts

[@grapes4864]

@@ajaysajeev007 l

[@mukulsharda2136]

Hello Ravi Sir, I was trying to solve this (19:52) question with (n/d), (n/n+d) method. But it is not giving the same answer. Can you suggest

[@beingsocial8787]

Very nice explanation sir.

[@sameersahu6471]

thank you sir 🙏your explanations made every concepts easy.

[@shreyachawla988]

Nice video, but in the last 2 questions simply equating distances would have been a much better approach without any need of formulae

[@anjaliwani1799]

can you explain how to solve by equating distances?

[@SanjayKumar-zf6fv]

you can use AM and HM concept

[@siddharthsuman3429]

​@@SanjayKumar-zf6fvbut what will be the numbers can you please tell me?

[@user-wr4oc7hl8d]

at 11:56, t2 equation why (s-s2) became (s+s2) in denominator?

[@kavyapande4886]

That's minus only when you will equate t1 n t2 you will get final S value same. Just typo

[@ashenashen5945]

Can anyone pls explain case3 and how did we get the value of S?

[@lovelybagaria7737]

@22:19 how come we are taking change in speed in km/hr but change in time in mins . Shall we not take both in same units hr or min ?

[@mayukhghorui1220]

Getting cancelled anyways in both sides , so no issue

[@bhuvendrasingh2686]

Quality content thanks

[@satishchodisetti7896]

In last question how can we do it by taking hours ,but iam confusing 1 hr 45 min as 1.45 h and 1 h ????🤔🤔🤔🤔

[@athiyamariamfarookh390]

nope, it is 45/60 that is 0.75 hours therefore 1hr 45 mins is 1.75 hrs

[@satishchodisetti7896]

@@athiyamariamfarookh390 👏🏼🤝

[@tapu9130]

I think in last question time was in minutes and should have been converted into hours

[@16psycheee]

Knsa cllg mila bro

[@alpana2676]

​@@16psycheeewbu?

[@syedhasanabbas859]

​@@16psycheeekonsa college Mila brooo

[@vatsalplays3868]

​@@syedhasanabbas859 konsa clg mila bro

[@Kapilsharmaashow]

Konsa clg mila bro

[@hemantpatidar8467]

HOW DO WE KNOW SIR WHICH FORMULAS HAVE TO APPLY IN WHICH QUESTION I DONT GET THAT

[@rehbarshaikh2924]

1st Question we can do by ratio method also

[@lightt.yagamii]

Bro you look so handsome.!! CAT ho gya aapka?

[@rehbarshaikh2924]

@@lightt.yagamii Thank you so much. CAT ka result itna accha nahi aaya isiliye CMAT deke mene admission le liya.

[@rohit49..92]

Wonderful session.....

[@ayushharsh7842]

Thank you Sir! Really grateful.

[@siddharthchoudhury4158]

exceptional ..GOD LEVEL

[@diablo4371]

7:32 here speed S is actually decreased to S1 no?...from 20 to 5m/s. I didn't the logic

[@rikky6769]

Case (1) If time is "replaced by new time to be decreased" and speed "remains same" Case (2) If the speed is "replaced by new speed to be increased" and time is "decreased by T1" Then distance of Case (1) = distance of Case (2)

[@rajnandansinghchauhan6536]

Why he equated the equation in second question can anyone tell me

[@niteshdubey2138]

Sir you are super hero

[@HarshitJain-rg9qq]

God bless u sir.

[@yashshah3169]

In the last ques speed should be 60km/m bcz you are calculating it in mins. How is it 60km/h. Please explain.

[@siddharthyadav9625]

No bro , as we have equated both side as equal. If you convert them as 60/60 and 105/60 . both the denominator ( i.e - 60 ) will get cancelled.

[@rupashreenth]

Thank you so much sir. Your videos are gems. It helped me to gain confidence in arithmetic ✨

[@AshwiniSingh-yu6pv]

For the first question, we can simply find the actual time using the formula t=t1(s+s1)/s1 t= 40(12+3)/3= 200 mins=10/3 hour

[@kalpanakumari9592]

Thank you so much

[@parthgilra6956]

why is time taken in mins and speed in km/h?

[@prabuddhadurge4114]

That doesnt matter, dimensionally minutes will get cancel from both the sides

[@rajenderashivaji4367]

Thanks ❤❤

[@uniqueallinone5597]

Hello sir I have one dought

[@aniketsurya4258]

THANK U SIR

[@ancychacko2965]

in the 1st que...how are t1&t2 same

[@AnkitKumar-ws4kt]

Change in time with respect to orignal time is same magnitude so

[@Shivam_General_Fitness]

Thanku sir

[@TheRitikgrover]

🙏🏻

[@mayankraj5820]

AP and HP method seem much fast and easier to me .

[@kavitaarora3720]

In 1st question how can we apply AP and HP , can uh explain!:(

[@DSA_Coding]

@@kavitaarora3720 t-40 t t+40 are in AP then s+3 ,s , s-2 will be In HP find s using Harmonic mean simple

[@harshitsharma-gj1dl]

@@DSA_Coding by applying the s=2(s+3)(s-2)/s+3+s-2....from here s comes 6 not 12 , can you please explain this discrepancy?

[@kshitijbalonie4361]

Thankyou sir

[@ultimatespectator137]

I know you won't be reading this comment but this video frustrated me. So many ads . After every 5-8 mins. If you are reading this add 10 ads in the beginning of the video altogether not in between.

[@applepie4891]

Relax dude....ads is their only source of income when are giving such high quality content for free....you can try ad block app....it'll help

[@rakshitchauhan3866]

premium le le fir

[@farhakhan5113]

Itna sb free me derhe he Kch earning horhi h to dikkt kya hai! Premium lelo fir or kya

[@vatsalparikh3574]

Use brave

[@prayasdivlogging6925]

the 3 cases you solved ...1st is correct 2nd and 3rd are incorrect . please put the reply here by correcting the equations !!!!

[@venkatsai258]

No they are correct. But for third take t2 = (t.s2)/(s1-s2) [ from t=(s-s2)*t2/s2]. .sir has put it s1+s2 by mistake.

[@rohitranawat4453]

Abe dis like kaun karta h .

[@kalpanakumari9592]

Thank you sir for this beautiful explanation

[@anjaliwani1799]

thanks for such clear explanation