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Sand is being poured on the ground from ...

Sand is being poured on the ground from the orifice of an elevated pipe and from a pile which has always the shape of a right circular cone whose height is equal to the radius of the base. If the sand if falling at the rate of 1000 cubic cm per, sec, the rate at which the height of the pile is rising when the height is 40 cm is

A

`5//8 pi` cm/sec

B

`1//100 pi` cm/sec

C

`5//12pi` cm/sec

D

`1//120pi` cm/sec

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The correct Answer is:
A
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AAKASH SERIES-RATE MEASUREMENT-PRACTICE SHEET (EXERCISE - 1) (LEVEL - 1) (STRAIGHT OBJECTIVE TYPE QUESTION)
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