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Math Help - Volume of a sphere

  1. #1
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    Post Volume of a sphere

    i have a question that asks for the volume of the sphere using "Volume of Solids of Revolution" i know that the volume formula of a sphere is 4/3*pi*r^3 but how do i get to that because when i integrate the area, i come up with 1/3*pi*r^3. i just need to know how to go from the integral of pi*r^2 to 4/3*pi*r^3.

    thanks in advance
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  2. #2
    Member eXist's Avatar
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    Can I see the full integral please?
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  3. #3
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    Can I see the full integral please?
    don't worry, i have figured it out. need to find the integral of r^2=x^2+y^2, not pi*r^2. thanks anyway
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