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A spherical balloon is being inflated so...

A spherical balloon is being inflated so that its volume increase uniformaly at the rate of `40 cm^(3)//"minute"`. The rate of increase in its surface area when the radius is 8 cm, is

A

`8cm^(2)//min`

B

`10cm^(2)//min`

C

`20cm^(2)//min`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
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