1.

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

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



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