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Math Help - Computing the surface area of a volume of rotation

  1. #1
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    Computing the surface area of a volume of rotation

    Hey guys;
    Like the title says, I am asked to find the surface area of a sphere using integration. I have been given the equation y^2+x^2=1. I know how you find volume (that's the first part of the question), but how do you find the surface area of the sphere using integration?

    Thanks,
    Peter
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    Quote Originally Posted by flybynight View Post
    Hey guys;
    Like the title says, I am asked to find the surface area of a sphere using integration. I have been given the equation y^2+x^2=1. I know how you find volume (that's the first part of the question), but how do you find the surface area of the sphere using integration?

    Thanks,
    Peter
    have a look at the information provided in the link, then scroll down to example #1 (bottom of the page)

    http://www.ugrad.math.ubc.ca/coursedoc/math101/notes/moreApps/arclength.html
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