Differentiation

Differentiation

Secondary 4

An inverted conical container has height \(12\text{ cm}\) and rim radius \(4\text{ cm}\). Water drains at \(4\pi\text{ cm}^3/\text{s}\).
Find the rate of change of the water depth when \(h=6\text{ cm}\).

Solution:

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Answer:\(\frac{\mathrm{d}h}{\mathrm{d}t}=-1\text{ cm/s}\).

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