Q.

The approximate change in the total surface area of a right circular cone when the radius ‘r’ remains constant while altitude h changes by ‘α’ is

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya

a

πrhαr2+h2

b

πrhr2-h2

c

πhαr2+h2

d

πrhαr2-h2

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Question Image

δh=α   l2=r2+h2s=πrl+πr2=πrr2+h2δs=πr2r2+h2 2hδh=πrhαr2+h2

Watch 3-min video & get full concept clarity

tricks from toppers of Infinity Learn

score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon
The approximate change in the total surface area of a right circular cone when the radius ‘r’ remains constant while altitude h changes by ‘α’ is