Surface Areas and Volumes | NCERT Exercises 11.1 and 11.2 | Chapter 11 | Arsh Ma’am | Class 9

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[@BYJUSClass910]

Hello kids! Check your understanding of the Surface Areas and Volumes chapter by answering these 5 quick questions in the form: forms.gle/UAuya2hyBmwbDyn86

[@user-et7cx4bi2e]

Hello

[@dealingwithgames1475]

Maa mg

[@chitraketsingh5972]

The correct answer is 3.5 cm❤❤❤❤❤

[@astha--]

VERY HELPFUL SESSION MAM:) MAM PLEASE BRING PRACTICE SESSIONS OF EXAMPLER AND OTHER REFERENCE BOOKS OF ALL THE CHAPTERS........ 🔴HOMEWORK- QUESTION - 52:30 II) surface area of sphere= 4πr² Or, 4*22/7*(21/2)² = 1386cm² III) surface area of sphere= 4πr² Or, 4*22/7*(3.5/2)² = 38.5cm² QUESTION- 1:05:10 Surface area of sphere= 4πr²=154cm² Or, 4*22/7* r²=154cm² Or, r²= (154*7)/(22*4) Or, r²= 12.25 cm² Or, r=√(12.25cm²) Or, r= 3.5cm(answer)

[@AYUSHRANJAN-ir9dr]

Yes mam we want more and more question practice from rs agrwal rd sharma ncert exampler

[@vedam_vox]

we need more classes with more reference books like RD Sharma, RS Aggarwal etc

[@TheRealAbhimanyu]

Thank you🙏🙏❤🙏🙏 so much mam For the session. Really Enjoyed it. 😍😃 Homework: - {Ex-11.2 questions no. 1 ,2,6} Question no :-1 (48:44) Answer: - TSA of Spheres 4πr² of given Radius: - i) 10.5cm, TSA of sphere 4πr² =4×22/2×10.5×10.5= 1386cm² ii) 5.6cm, TSA of sphere 4πr² =4×22/2×5.6×5.6=394.24cm² iii) 14cm TSA of sphere 4πr² =4×22/2×14×14=2464cm² Question no. 2 (52:35) TSA of sphere 4πr² of given diameter: - I) 14cm, r=7cm TSA of sphere 4πr² =4×22/2×7×7=616cm² II) 21cm, r=10.5cm TSA of sphere 4πr² =4×22/2×10.5×10.5 =1386cm² III) 3.5m, r=3.5/2=1.75m TSA of sphere 4πr² =4×22/2×1.75×1.75=38.5m² Question no. 6 (1:05:37) TSA of sphere 4πr² =4×22/2× r²=154cm²(given) 4πr²=154cm² r²=154/4π r²=154×7/4×22 on solving we get = r²=49/4 r=√49/4, r=7/2=3.5cm Answer Mam we want practice session of Quadrilateral, Herons Formula and Circle, for Unit test II and later Rest of the chapters for Final Examination. Thank you so much mam once Again. 🙏🙏😍🙏🙏

[@KavyaTy.]

You are a Genius likely you have typed whole calculations ...

[@sheelapatidar9595]

Good evening mam, I am Vedika😊 ❤Thank you for giving such useful session😊😊 Ex.11.2 Q1) 1) 1386cm^2 2) 394cm^2 3)2464cm^2 Q2) 1)616cm^2 2) 1386cm^2 3) 38.5cm^2 🛑Homework Question: Q6) surface area of sphere=154cm^2 And radius= ? 4πr^2 = 154cm^2 4 x 22/7 x r^2 = 154cm^2 r^2 = 154 x 7 / 22 x 4 r^2 = 12.25 r = √12.25 r = √3.5^2 r = 3.5cm So, the radius of the sphere is 3.5 cm.

[@suchitrasalve2952]

MAM THANKS A LOT FOR THIS WONDERFUL SESSION MAM FOR PRACTICE WE SHOULD SOLVE SOME SAMPLE PAPERS FROM CBSE IF AVAILABLE

[@KRITIRAJPUT75]

So helpful session mam ✨ Home work 🔴 Q2. 2 Given diameter = 21 Radius = 21/ 2 Formula = 4πr2 4*22/7*21/2*21/2 1386 cm2 Q2. 3 Same like above question But ans= 38.5 m2 Q6 Formula =4πr2 154=4*22/7*r2 49/4=r2 7/2=r 3.5 = r Again thank you so much

[@adarshguhan8157]

Accha bachha

[@user-zg5qp3id2k]

EXTRA QUESTION

[@sanjitadasbayan4503]

Yes we want more questions from rd sharma etc...

[@brave_buddy327]

Yeah.. especially from ncert exemplar and rs Agarwal

[@kanhasingh8150]

Bhai ye ncert ke questions h

[@adarshguhan8157]

Trie

[@mymisschaudhary-ot6wc]

48:49 only 1 chapter is left that is ch8 quadrilaterals only for final exam by the way ma'am tommorow is my exam of maths 18-12-2023 (monday)

[@adnananis8940]

No one asked👍

[@sukhbirkumar495]

165cm²

[@shaikhfaiz7338]

Thank you mam❤

[@create_566]

Ma'am your answer is wrong the right answer will be 5500 cm²

[@priyasandhu1027]

Thank you for the amazing session mam ❤❤and keep blessing 😀😀 🔺 Homework questions no. 1 Exercise 11.2 Ques-2 (ii) - diameter = 21cm Radius=d/2 = 21/2 TSA = 4πr^2 4 * 22/7 * 21/2 * 21/2 = 22 * 3* 21 = 1386 cm^2 Ques - 2 ( III) = diameter = 3.5 m Radius = d/2 = 35/ 20 TSA = 4πr^2 4 * 22/7 * 35/20 * 35/20 11* 35 / 10 385 /10 38.5 🔺 Homework questions no. 2 Exercise 11.2 Question - 6 Answer = Surface area of sphere = 154cm^2 4πr^2 = 154 r^2 = 154 * 7/ 4* 22 r^2 = 49/4 r^2 = (7/2)^2 r= 7/2 Again thank you for the session mam and keep blessing 😀😀😀 Mam plsss bring a session of solving different types of reference books and also bring of competency based question 😀😀😀😀😀 For all chapter as best practices And plss bring these sessions faster as my pre board is arriving in 1st of the week of December 😀😀😀

[@GurkomalSingh-yc7gr]

Hi Priya

[@XD1-ggs]

Your 35:50 pe ans galat h mam 10 se multiply bhi hoga then 5500 ans hoga

[@SG.ANIMATES]

Can anyone can tell me is cube and cylinder exercise are delted or not

[@Cricketshorts5.8]

Deleted bro

[@user-hw4de7ns2f]

1:34

[@pennvizz_notpennywise]

Questions from NCERT EXEMPLAR

[@SHOPEECART2]

137280

[@user-ui8cq1ns2v]

Mam part 2 ka 1 no ka ans 616 cm2

[@ashatiwari7049]

Ques-6 ka answer hai surface area 4pi r square and the choice for very important questions Jo exam based hai vo wali series li jaye and mam you teach very excellent my paper was full mark in maths thank you so much

[@Prantajyoti-rv4tv]

Thank you ma'am for this helpful session 😊🎊🎊🙏🙏🙏🙏🙏❕ 1️⃣ Homework : (i) given, diameter = 14cm radius, r = 14/2 = 7 cm Surface area of the sphere= 4πr² =4×22/7×7² = 616 cm² (ii) given, diameter = 21 cm radius,r = 21/2 cm Surface area of the sphere = 4πr² = 4×22/7×(21/2)² =1386 cm² (iii) given, diameter= 3.5 m radius,r = 3.5/2 m Surface area of the sphere = 4πr² =4×22/7×(3.5/2)² =38.5 m² 2️⃣ Homework: radius, r = ? Surface area of the sphere =4πr² 154cm². =4×22/7×r² r². = (7/2)² r. =3.5 cm

[@MOKSHTKD7]

❤

[@Tmkoc11101]

Thanks mam

[@BarsaPatro-nq9mo]

Yes mam want more videos of practice 😊who agreed with me like here 👇

[@33adityasingh16]

Answer is 3.5 of question no.6

[@bangarulokam8562]

11 . 3 and 11.4

[@shado9931]

Mam plz give some revision for annual for class 9th💭

[@satyaprakash-ss2rw]

Man ques 2 ka answer galat likha h aapne answer is 113.14

[@user-ks1sb1ct7x]

One shot is very nice

[@Anshika-ch8dr]

Anyone can please send me the link of this chapter oneshot

[@user-lp6iy9fi8d]

Circle😢😢😢😢😢

[@user-et7cx4bi2e]

Hello mam your teaching trick is awesome

[@akashmalik5022]

Thank you ma'am

[@balgovind5459]

Question 7 answer is wrong it will be 5500

[@Sanju-pu9ec]

3.5

[@krishanlal5930]

Your not science teacher so I failed at my science paper😢😢

[@RadhaPawar-mv1mm]

122.57

[@Gamerdemon-xm2rb]

Ans is 165 cm

[@trinathmishal5228]

I like your class miss

[@Islamic_world_70]

Triangles and circle

[@33adityasingh16]

Mam hw ka answer 3.5 hai

[@bhavyanarayana5545]

❤❤❤❤❤ Thanks mam for your explanation

[@user-xc3sv7sm6b]

mam link of short veideo

[@user-zg5qp3id2k]

MAM WHEN YOU DO EXTRA QUESTIONS

[@ShaikShaeena-ks1kq]

Mam Areas chapter

[@surajrana5742]

Mam I want rs and exampler please mam I know mam you help me

[@feelandbelive]

done

[@user-ui8cq1ns2v]

Mam mujhe circle ch ka measurment sums me dout hai

[@shubhangikshirsagar5054]

More questions😊 you are teaching very good and I am understanding all

[@Islamic_world_70]

Only 2 lesson are remaining mam

[@liveAryangaming0007]

1

[@user-xc3sv7sm6b]

mam link nhi mlii

[@SantoshYadav-ks4lg]

Q.1=1386,Q.2=3850

[@UPSCWALLAH204]

Good night mam❤

[@meghanarepaka3141]

Yes mam we are enjoying the session

[@adityachitranshi3933]

We want rd Sharma book questions

[@adarshguhan8157]

Mam this is the best yet channel for math your explanation is the best after seeing your explanation I even joined the BYJUS ncert course 😊😊

[@adarshguhan8157]

Yea bro same

[@Pranavtanishvlog]

Hi

[@user-ui8cq1ns2v]

Mam rs aggarwal ka solution karwa dejiye na mera exam 23th nov ko hai

[@dhanasree8468]

Statistics is last mam

[@user-ry7fh8vl9t]

2444 answer

[@pravinkumar543]

Mam this is chapter very easy

[@user-ui8cq1ns2v]

Mam ex 11.2 ka Q1 par 1 ka ans 1386cm2

[@Yogeshpal1007]

0.64056 m2

[@svhs..teluguaircraft1686]

Mam plz explain triangles chapter . 9th class

[@user-rc9xp1sg7q]

this vidio is so good

[@Pushpatomer0]

Very well explanation mam thanks😊

[@nilam1157]

Ma'am circle aur quadrilateral chapter me doute hai

[@BhureOjha-we4kf]

Hello

[@user-hw4de7ns2f]

Hy

[@user-ui8cq1ns2v]

6 no 3.5 radius

[@dineshsingh4882]

26 m Kaise aya

[@kishlaykumar3580]

Fantastic session mam ❤❤❤

[@user-mb6rp1uk8f]

1244:cm2

[@harshitrai882]

D/8 kaise aaya 11.2 q7

[@DileepKumar-pz5fu]

It was a very useful session mam Q6:given :surface area=154cm^2 Surface area of of sphere=4

[@bangarulokam8562]

Yes mam we want rd sharma

[@Shivanshyadav-ue7ko]

Mam Rs aggarwal

[@sapanaupadhayatripathi7619]

maam please take a रेविसिओं with R D sharma

[@adithyarohankumar8600]

Mam please do one shot revision of maths like Saurabh sir

[@user-gv5cz8cj2x]

Hii

[@pratigyamandavi6456]

Hiii...

[@Tayu24.]

what else could happen exercise 11.2 question no1 , 1386 cm sq , 49280 cm sq, 1232cmsq , 42856 cm sq Question no2 1st 308 cm sq

[@prasadyvd3900]

Thank you so much ❤❤ because of this I got confidence to get nice marks

[@Tayu24.]

Ma'am mene jab 11.2 ke question no 4 ko numerical solve kar ratio me nikal to answer 1:8 aaraha tha ......

[@kTOSHITH]

hi mam

[@user-qp3sf7qn8j]

Mam I want rd Sharma problems

[@jeetprajapati8886]

😫😫😫😖😖😖🥺🥺🥺😭😭😭😭😭 mujhe divide multiple or cutting krna nhi aara ye kuch ho nhi re merse

[@user-mb6rp1uk8f]

462cm2

[@ashatiwari7049]

And answer is 3.5

[@feelandbelive]

no thing

[@shreewaligupta6490]

Very Helpful Session Mam Really Enjoyed a lot😄❤ 🔺HOMEWORK🔻 Ex. 11.2 Q.2 ii) 1386 cm^2 iii) 269.5 cm^2 Q.6 radius = 3.5 cm I wish that BYJUS would bring the MATHS OLYMPIAD session. It will be beneficial for the Maths Olympiad which is on 14 December😊

[@mannyashyash4210]

I have dought

[@user-et7cx4bi2e]

Why

[@user-ny8ir7tv9u]

Ma'am you are so beautiful❤

[@Fortunerrider132]

1244.57 ansew

[@user-ks1sb1ct7x]

Hiii

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Hlo

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Yyy

[@siddhigupta198]

no maam