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Thread: Cube

  1. #1
    Junior Member Nadeshiko's Avatar
    Sep 2013


    A cube of side length 2 centimeters is rotated 360 degrees about the line connecting the centers of two opposite faces of the cube. What is the volume of space, in cubic centimeters, that is swept by this revolution?

    I am not sure about this problem. Would you please give hints or guides to answer the problem? Thanks! It would help me out a lot !! ^__^
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  2. #2
    Super Member
    Sep 2013

    Re: Cube

    You need to know the surface area of a cylinder: 2*pi*R*h, R is the radius and h is the height of the cylinder.
    Can you sketch a figure showing what is R and what is h in your cube? You may need to calculate the radius from the given data of the cube.
    Last edited by votan; Sep 23rd 2013 at 10:31 PM. Reason: adding characters
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