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  4. The rate of change of the volume of a cone with respect to the radius of its base is -

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Q. The rate of change of the volume of a cone with respect to the radius of its base is -

Application of Derivatives

Solution:

$V=\frac{1}{3} \pi r^2 h$
$\Rightarrow \frac{d v}{d r}=\frac{2}{3} \pi r h$