Find the rate of change of the area of a...

Find the rate of change of the area of a circle with respect to its radius 'r' when r = 2 cm.

Answer

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APPLICATION OF DERIVATIVES
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Knowledge Check

Find the rate of change of the area of a circle with respect to its radius r when r = 4 cm, is

A

`6picm^2//s`

B

`4picm^2//s`

C

`8picm^2//s`

D

None of these

Find the rate of change of the area of a circle with respect to its radius r when r = 4 cm, is

A

`6picm^2//s`

B

`4picm^2//s`

C

`8picm^2//s`

D

None of these

Find the rate of change of the area of the circle with respect to its radius r when r = 6 cm is

A

`10pi`

B

`12pi`

C

`8pi`

D

None of these

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