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प्रश्न
Find the rate of change of the volume of a cone with respect to the radius of its base ?
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उत्तर
Let V be the volume of the cone. Then,
V =\[\frac{1}{3}\pi r^2 h\]
\[\Rightarrow \frac{dV}{dr} = \frac{2}{3}\pi rh\]
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