The rate of change of volume of a sphere...

The rate of change of volume of a sphere is equal to the rate of change of its radius, then its radius is equal to (a) 1 unit (b) units (c) unit (d) unit

A

1

B

`(1)/(2 sqrtpi)`

C

`sqrt2pi`

D

`(1)/(sqrt2pi)`

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The correct Answer is:

B

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