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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 balloon when its diameter is 14 cm is...

A

7 Sq.cm//min

B

10 Sq.cm//min

C

17.5 Sy.cm//min

D

28 Sq. cm//min.

Text Solution

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The correct Answer is:
B
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