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Math Help - volume of a cylinder tank, help please

  1. #1
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    Post volume of a cylinder tank, help please

    The volume of a cylindrical tank is given by the formula V=pieh r^2 where h is the height of the cylinder and r is its radius. Find the volume to the nearest tenth of a cubic foot, radius is 3 feet and height is 5 feet.
    so r is two times the feet, 3x2x5=30 cu,ft, this I think is wrong or I'm missing something. thanks for helping and checking.
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  2. #2
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    Quote Originally Posted by kwtolley View Post
    The volume of a cylindrical tank is given by the formula V=pieh r^2 where h is the height of the cylinder and r is its radius. Find the volume to the nearest tenth of a cubic foot, radius is 3 feet and height is 5 feet.
    so r is two times the feet, 3x2x5=30 cu,ft, this I think is wrong or I'm missing something. thanks for helping and checking.
    You are told that:

    V= pi h r^2,

    also that the radius r=3 ft, and height h=5 ft, so:

    V = pi 5 3^2=pi 45 ~=3.1416 45= 141.37 cubic ft.

    RonL
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  3. #3
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    Smile thanks

    I see where I was way off, thanks this will help me withthe rest I have to do.
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