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The radius of the base of a cone is incr...

The radius of the base of a cone is increasing at the rate of 3 cm/min and the altitude is decreasing at the rate of 4 cm/min. The rate of change of lateral surface when the radius is 7 cm and altidue is 24 cm is

A

108 `pi cm^(2)//min`

B

`7 pi cm^(2)//min`

C

`27 pi cm^(2)//min`

D

none of these

Text Solution

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The correct Answer is:
A
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