Calculus

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The volume of a cone of radius r and height h is given by V=1/3pir^2h. If the radius and the height both increase at a constant rate of 1/2 centimeter per second, at what rate, in cubic centimeters per second, is the volume increasing when the height is 9 centimeter and the radius is 6 centimeters?

explain please

  • Calculus -

    annnnd....

    a)1/2pi
    b) 10pi
    c) 24pi
    d) 54pi
    e) 108pi

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