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Sand is pouring from a pipe at the rate ...

Sand is pouring from a pipe at the rate of `12` `cm^3` / s. The falling sand forms a cone on the ground in such a way that the height of the cone is always one-sixth of the radius of the base. How fast if the height of the sand cone increasing when the height is `4` cm ?'

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BODY BOOKS PUBLICATION-APPLICATION OF DERIVATIVES-EXERCISE
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