Curved Surface Area of Cone || for Class 9 in Hindi

In this Mathematics (Mensuration) video in Hindi for class 9 we derived the formula for the curved surface area of a cone. The curved surface area of a cone is πrl, where r is the radius of the circular base and l is the slant height.
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• Class 9 : Mathematics ...
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[@shivanshgupta1874]

Sir ap bahut mast vedio banatai ho or samajha tai ho plz iski or vedio banado l request sir plz ...... Plz sir e.g cubiod , 'cube , cylinder, total surface area a cylinder etc plz sir .....

[@BabitaKumari-ui7ez]

At 5:43
R and l toh same h butt wo appas m cancel out kyun nhi hua?

[@Relates_to_ur_life]

@@BabitaKumari-ui7ez r cone ke base circle ka radius h aur l sector ke circle ka radius..dono alg h alg circle ke radius hai

[@Relates_to_ur_life]

Cube, cuboid, cylinder..ye to esy h.
i)ᴄᴜʙᴇ..square se bnta h, cube me 6faces hote h yani 6sqrs
1sqr ka area agr a² to 6faces ka 6a²..
=> TSA=6a²
Same, LSA=4a²..bcs 4faces hogye Yani 4sqrs
ii)ᴄᴜʙᴏɪᴅ.. Ye 6rectangles se bnta h.. Top & bottom dono same dimensions ke h l & b.. To area(top & bottom)=lb+lb=2lb
Ab 4walls.. To ek side ke opp walls ka hoga bh+bh=2bh
And othr side ke opp walls ka lh+lh=2lh..
So, tsa=2(lb+bh+hl)
iii)ᴄyʟɪɴᴅᴇʀ.. Ye circle se bnta h.. Circle ke upr circle rkh ke jse sikke ke upr sikka..
CSA=2πrh..
1circle ka crcmfrnc=2πr..ab yhi circumfrnc pure h height tk ja rha h, that's y..2πr×h=2πrh
Baki total ke liye top & base ke circles ke area ko add kr do..
To TSA=2πrh+2πr²

[@masterblaster3653]

Cuboid cube are so easy you can derive it yourself
Cylinder is also kinda ez

[@mohdparvaizbhatjnvbudgam633]

@@BabitaKumari-ui7ez R is the radius of Sector (when it forms radius of circle in the base of cone) . And L is the radius of circle. L and R are not same

[@rachitsingh9990]

This video is awesome, superb and very knowledgeable for ""MATHS LOVERS"".

[@salimjaved1890]

Being a teacher, I felt the video was super. This will definitely help my students. Thanks.

[@anjusureka9874]

Thank you sir very much 🙏 U explained every step clearly and in detail

[@nehashah9946]

It's superb....this type of education is required in our schools....perfect

[@adr420]

Thank you very much sir ....
I was struggling for that ....

[@thimmasamudramsivasaisreer9623]

Wonderful explanation sir never heard such a clear explanation from anyone.Thanks alot guruji ❤️❤️

[@sakethrebel8182]

Excellent teaching. Very conceptual and lucid.. majaa aagaya sir ji !!❤❤

[@patakotisrinivas1918]

Excellent sir..so lucid,so lucid...thanks a lot...

[@rishiparmar111]

♥️♥️♥️ amazing pls 🙏 make formulas for frustum of a cone

[@veenanaithani8322]

Wow,very nice sir🙏🙏 bilkul sahi , formula to nikalna batana hi chahiye ,sab direct formula rata rahe hai ,aap perfect teacher hai 👌👌👌👌👌

[@b.o.t.2060]

Helped a lot... Loved it...

[@sanjayjaiswal1289]

Great practical guide

[@krishnachaudhary410]

Better than Best ☺️🔥👍👍

[@priyanshithoughts7818]

Very well made!!

[@sukoon2336]

Tysm..i ws literally confused in this topic..u made it very clear..thanks once again

[@BabitaKumari-ui7ez]

At 5:43
R and l toh same h butt wo appas m cancel out kyun nhi hua?

[@scrltmcw963]

@@BabitaKumari-ui7ez R aur L different hai. R cone ke base ka radius hai aur l cone ka slant height hai. Btw wo same hote to bhi cancel nahi hote r² ya phir l² hota

[@anjuyeswanth]

Very well explained... Thankyou so much sir...

[@prabirbhowmick8788]

What s clear cut explanation. At the age of 56, enjoyed...now time for cylinder...

[@UniverseLover13579]

Excellent and very useful video, Sir. Thanks a lot again sir for teaching us Mathematics with your best teaching skills are care. A lot of respect and love to you, Sir ❤️❤️ Take care of your health 🙏🙏☺️☺️ Sir, please upload this videos on your 'Edunext maths 9' Channel.

[@BabitaKumari-ui7ez]

At 5:43
R and l toh same h butt wo appas m cancel out kyun nhi hua?

[@UniverseLover13579]

@@BabitaKumari-ui7ez 'r' and 'l' are not same. 'r' is the radius of the Base of the Cone and 'l' is the slant height of the Cone. Therefore l² = r² + h²

[@Jaqen_Hghar]

Thanks a lot, this is the easiest solution to this problem.

[@surendrakumar2610]

Beautifully explained.

[@RavindraKhalkar-ti2px]

Very useful and best explanation !

[@swastikadas431]

Thank you sir, for your good demonstration

[@onpathak]

Very nice explanation. Great job. 👌👌

[@EduTalkSC]

awesome way to represent........May I know which software you use to represent these lessons ?

[@ranvirsingh4457]

Power point

[@manjunagwanshi5465]

Good morning sir.
Very nice video.
I got it.
Thank you sir.
🙏🙏🙏🙏.

[@stj1203]

Very wonderful explanation

[@ramkiramki8453]

Brilliant sir explanation 👏

[@prashant24]

Legendary 🔥

[@santoshkanekar7801]

Amazing..❤️

[@Ajay.Tiwari]

Best educator

[@oozwalmahali2142]

sir please make a video on why the cone have 1 by 3 in its volume formula

[@shashibhushanpracticeofexa9610]

Wao! Mind blowing

[@निःShabd]

Sir similarly sphere ka volume & surface are bhi explain krein pls..

[@youtubeeducationbot3725]

Amezing 👍

[@angstromscience9123]

Adbhut❤️

[@RituShortsIndia]

Very good explanation 🙂

[@kanishkabora2213]

Thanks a lot sir i understand the concept very clearly 😃😇

[@abhiff6046]

Perfect explanation sir super super super 👏❤️❤️❤️❤️😁

[@MAHATHACLASSES]

Bahut badhiya

[@Ashishyadav-pt4xf]

AWESOME !!! you have explained in a very simple way thank you

[@mihirsheth9918]

Great video 👌🏻

[@gosula.amaralingeswararao8698]

Sir ur explanation is good

[@suryanshsharma1433]

Very nicely explained

[@sciencegk5505]

You are great teacher.

[@edupoint.secondary]

Thank you very much for your huge support.
🙏🙏🙏

[@BabitaKumari-ui7ez]

At 5:43
R and l toh same h butt wo appas m cancel out kyun nhi hua?

[@Carlos-qz7ul]

Beautiful demonstration, detailed and progressive. Thanks! 👌

[@sunya6865]

Nice!! 👍

[@dolatram1236]

Wonderful!

[@ashutoshtiwari2064]

Teachers school me ratuu Vidya hi dette hai kitni Sharma ki batt hai excellent work

[@allo101]

Thank you sir please make this type of video

[@yawer-zq4hu]

which software is used to make such videos/animations?

[@Cartoon_babu786]

Sir why do we need to take PI in circle case.

[@crazysterart7288]

👍👍👍

[@serenakhanra4327]

Great 👌

[@asoinib8235]

Thankyou sir 🙏🏻❤️

[@masterblaster3653]

What if the angle is given to us then we can use the angle to know how many times of this circle is this sector right?

[@user-jq5sq1zb2k]

Which software do you used to make this video sir?

[@t.r.g-ravigaming9937]

Thanks for making video on science

[@edupoint.secondary]

Almost every topic is vailable.

[@AnilKumar-vf7tp]

Very well explained
But area of Sector (1/2 l. r) bhi hota hai us se or easy ho jaiga

[@ramupattu9444]

I do not know Hindi. But I clear understand this video. Because diagram great hlepful .

[@farhaanspeaks]

EXCELLENT THAN GOOD

[@manojsinghjalal565]

aap jaisa teacher maine kahi nahi dekha

[@drivingmaster5809]

Very helpfull video

[@RajahmedInamdar-uu9ze]

tq sir simple nice explntn

[@riteshyadav5735]

Good morning sir please shoot video on quadrilateral chapter

[@kingxlitegamer.2607]

thank you so much Sir 😊.
my most confusing chapter..
sir please sir sare formulas ka postmartem kar dijiye 🙏🏻

[@BabitaKumari-ui7ez]

At 5:43
R and l toh same h butt wo appas m cancel out kyun nhi hua?

[@ashutoshtiwari2064]

Hi jaise baccho ka sahara ho bhagwan aapko sadaiv khush rakhe

[@technoduniya9863]

thank you sir

[@bipadtaranmandal2972]

Nice 👌

[@hyhardys]

Sir I am big fan

[@musicalwings2450]

Well explained

[@gaxegaming5193]

Bhut op💥

[@DhirajKumar-on6mk]

Sir pls pie ke bare kuch Bata dijye na MATLAB uska value se related

[@SSB_TATS]

Thnk u sir🙏

[@sumankumaryadav1534]

Superb Sir

[@DhaneshwarSahu-wq2fg]

Very beautiful ❤

[@amanrahi5402]

Thanks Sir🙏🙏

[@user-bp9gh5zu2d]

Amazing video 😌

[@Princekumar-iy8nh]

Very helpful

[@msaina9977]

Nice explanation

[@calltowardsallah9248]

Sir ap cone ki slant height ko length consider krte ho lekin maine padh ha length horizontal measurement hota hai so cone ki length slant height kaise huvi plz reply ma boht confusion ma hu plz reply

[@josefvijay6837]

Supper sir ur explanation

[@NitishKumar-nt2im]

Thank you so much sir

[@faraz4978]

❤

[@santoshkumarsingh5081]

✌️

[@user-lg4gc2tn3x]

Fabulous

[@dineshmahto720]

😮

[@abinashdas1073]

Excellent

[@ankitpratap5335]

Mahan karya kr rhe hain aap

[@itssunaina5643]

Wow ♥️♥️♥️

[@analysischannel2322]

Love you sir

[@nagarajubeedilagampa]

for your explaination . take a bow

[@SAFuad-fz5tz]

Unbelievable!

[@tushargupta4793]

Thanks sir ,🙏👍👍🌸🌺🌹☘️

[@jayantakumarpathak6613]

Fantastic

[@RahulJain-xg4jx]

Berry nice editing

[@mohammadldrees2368]

Amazing

[@lovelypandey59]

Helpful☺️

[@riteshshukla8153]

Nice

[@ImranKhan-tu7ix]

It is not only for class 9 I have problem in engineering statics I am looking for centre of curve so I need area of cone i need area of 1/4 of cone

[@hectorgaming5707]

1:03