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The surface area of a spherical bubble i...

The surface area of a spherical bubble is increasing at the rate of `2 cm^(2)//s`. Then the rate at which the volume of the bubble is increasing at the instant when its radius is 6 cm, is-

A

`3 cm^(3)//s`

B

`2 cm^(3)//s`

C

`4 cm^(3)//s`

D

`6 cm^(3)//s`

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The correct Answer is:
D
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