Water is poured into a conical container such that \( \mathrm{P} \)...

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Water is poured into a conical container such that
\( \mathrm{P} \)
height of the cone is four times the radius of the cone.
W
If the radius of the cone is increasing at \( 3 \mathrm{~cm} / \mathrm{sec} \), then find the change in the volume of the cone, when the radius is \( 21 \mathrm{~cm} \).
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