E
Editor
Sep 18, 2022
Ripples in shape of circles are produced when a stone is thrown in water. If the rate of change of circumference of these circles is $12\pi$, what is the rate of change of area of the circle when the radius is 3cm
Difficulty: Easy
A:
$28\pi$
B:
$36\pi$
C:
$54\pi$
D:
$60\pi$
ID: 63273db8ca83163ac3a10317