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The slant height of a cone is fixed at 7...

The slant height of a cone is fixed at 7 cm. If the rate of increase of its height is 0.3 cm/sec., then the rate of increase of its volume when its height is 4 cm is :

A

`(pi)/(2)` cm/sec.

B

`pi` cm/sec.

C

`(pi)/(5)` cm/sec.

D

`(pi)/(10)` cm/sec.

Text Solution

Verified by Experts

The correct Answer is:
D
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