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A spherical balloon is being inflated at...

A spherical balloon is being inflated at the rate of 35 cc/min. The rate of increase of the surface area of the bolloon when its diameter is 14 cm is

A

`7cm^2//min`

B

`10cm^2//min`

C

`17.5cm^2//min`

D

`28cm^2//min`

Text Solution

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The correct Answer is:
B
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