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The volume of a sphere is increasing at ...

The volume of a sphere is increasing at the rate of 1200 c.cm/sec. The rate of increase in its surface area when the radius is 10 cm is

A

120 sq.cm/sec

B

240 sq.cm/sec

C

200 sq.cm/sec

D

100 sq.cm/sec

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The correct Answer is:
B
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