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Suppose that the radius r of a right circular cone of fixed height h = 20 cm is increasing at a rate 4 cm/s. How fast is the volume increasing when r = 10? Give your answer correct to two decimal places.

  • calculus -

    V = (pi/3) h r^2
    dV/dt = 2*(pi/3)*h*r*(dr/dt)
    You have all the terms you need to calculate that.

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