(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A water tank has the shape of an inverted right-circular cone, with radius at the top 15 meters and depth 12 meters. Water is flowing into the tank at rate of 2 cublic meters per minute. How fast is the depth of water in the tank increasing at the instant when the depth is 8 meters

2. Relevant equations

V=(1/3)(pi)(r^2)(h)

3. The attempt at a solution

dv/dt=2 meter^3/min

dv/dt=(1/3)(pi)(2rh(dr/dt)+(r^2)(dh/dt))

but that has 2 unknow varibles in it.

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# Homework Help: Related Rates in a water tank

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