The radius of a right circular cylinder increases at a constant rate

MATHEMATICS · Numerical · CBSE · Mathematics · Applications of Derivatives · Applications of Derivatives

Problem

The radius of a right circular cylinder increases at a constant rate. Its altitude is a linear function of the radius and increases three times as fast as the radius. When the radius is 1 cm1\,\text{cm}, the altitude is 6 cm6\,\text{cm}. When the radius is 6 cm6\,\text{cm}, the volume is increasing at 1 cm3s−11\,\text{cm}^3\text{s}^{-1}. When the radius is 36 cm36\,\text{cm}, the volume is increasing at n cm3s−1n\,\text{cm}^3\text{s}^{-1}. Find n11\frac{n}{11}.

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