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The rate of change of the area of a circ...

The rate of change of the area of a circle with respect to its radius r at r = 6 cm is:

A

`16picm^(2)//cm`

B

`12picm^(2)//cm`

C

`8picm^(2)//cm`

D

`11picm^(2)//cm`.

Text Solution

Verified by Experts

The correct Answer is:
b
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