#
Q56.solution pls.

Q.56. A balloon is pumped at the rate of 4 $c{m}^{3}$ per second. What is the rate at which its surface area increases when its radius is 4 cm ?

(A) 1 $c{m}^{2}$/sec

(B) 2 $c{m}^{2}$/sec

(C) 3 $c{m}^{2}$/sec

(D) 4 $c{m}^{2}$/sec

https://www.meritnation.com/ask-answer/question/the-volume-of-the-spherical-balloonis-increasing-at-the-r/application-of-derivatives/4859406

Regards

**
**