A spherical balloon is being inflated at the rate of \( \mathrm{P} ...

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A spherical balloon is being inflated at the rate of
\( \mathrm{P} \) \( 35 \mathrm{cc} / \mathrm{min} \). The rate of increase of the surface area of

W the balloon when its diameter is \( 14 \mathrm{~cm} \) is
(A) 7 sq. \( \mathrm{cm} / \mathrm{min} \)
(B) 10 sq. \( \mathrm{cm} / \mathrm{min} \)
(C) \( 17.5 \mathrm{sq} . \mathrm{cm} / \mathrm{min} \)
(D) 28 sq. \( \mathrm{cm} / \mathrm{min} \)
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