Q. 94.2( 50 Votes )
A balloon, which
Let V be the volume of the sphere, then
Therefore, Rate of change of volume (V) with respect to its radius (r) is given by,
…….. by chain rule
Thus, when r = 10cm
Therefore, the rate at which its volume is increasing with the radius when the later is 10 cm is 400π cm3/s.
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