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calculus

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Gravel is being dumped from a conveyor belt at a rate of cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the pile is feet high?
Hint: The volume of a right circular cone with height and radius of the base is given by .

  • calculus -

    Diameter is equal to height, or
    2r = h ---> r = h/2

    V= (1/3)πr^2 h
    = (1/3)π(h^2/4)(h)
    = (1/12πh^3
    dV/dt = (1/4)π h^2 dh/dt

    You did not list the given data in your post.
    Once you have them, just sub in to finish the question.

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