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Math Help - Find the rate of change

  1. #1
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    Find the rate of change

    Hi,

    I'm having problems understanding where to begin with this problem. Could someone here please point me in the right direction?
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  2. #2
    MHF Contributor MarkFL's Avatar
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    Re: Find the rate of change

    We are given:

    V=\frac{1}{3}\pi r^2h

    and h=3r so we may write:

    V=\frac{1}{3}\pi r^2(3r)=\pi r^3

    Now, implicitly differentiate with respect to time t, then use the values given for \frac{dr}{dt} and r to find \frac{dV}{dt}
    Thanks from calculus123
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