Q.

The radius of a circular plate is increasing at the rate of 0.02 cm/sec. when the radius is 10cm. Then the rate at which the area increases is

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.
An Intiative by Sri Chaitanya

a

0.4π  sq.cm/sec

b

0 .5π  sq.cm/sec .

c

0.6π  sq.cm/sec

d

0.1π  sqcm/sec

answer is A.

(Unlock A.I Detailed Solution for FREE)

Detailed Solution

drdt=0.02, r=10 A=πr2  dAdt=2πr.drdt=2π(10)(0.02)=2π(0.2)  = 0.4π
Watch 3-min video & get full concept clarity
Related Blogs
Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
Result Producing online coaching for JEE/NEET of south India
Largest All India Test Series for JEE/NEET
Best Online Course for IIT JEE
Best Online Course for NEET
Best Online Course for CBSE
score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

Related Blogs
Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
Result Producing online coaching for JEE/NEET of south India
Largest All India Test Series for JEE/NEET
Best Online Course for IIT JEE
Best Online Course for NEET
Best Online Course for CBSE
whats app icon
The radius of a circular plate is increasing at the rate of 0.02 cm/sec. when the radius is 10cm. Then the rate at which the area increases is