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 [Karnataka CET 2005]

A spherical balloon is being inflated at the rate of 35 cc/min. The ra

1.	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 [Karnataka CET 2005]
A.	7 sq. cm/min
B.	10 sq. cm/min
C.	17.5 sq. cm/min
D.	28 sq. cm/min
Answer» C. 17.5 sq. cm/min

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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 [Karnataka CET 2005]

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