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Water is dripping out from a conical fun...

Water is dripping out from a conical funnel of semi-vertical angle `pi/4` at the uniform rate of `2c m^3//s e c` in its surface area through a tiny hole at the vertex in the bottom. When the slant height of the water is 4cm, find the rate of decrease of the slant height of the water.

A

`(sqrt2)/(4pi)cm^(2)//sec`

B

`(sqrt2)/(pi)cm//sec`

C

`(sqrt3)/(4pi)cm//sec`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
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