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Math Help - I'm having trouble with volumes and surface areas.

  1. #1
    Junior Member
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    Jun 2010
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    I'm having trouble with volumes and surface areas.

    Hey there, I have some trouble understanding how to find volumes and surface areas using double/triple integrals. It's not a homework or anything, just maybe you can point me into the right direction .

    Here are 2 examples:

    Find the surface area delimited by the surface x^2+y^2=z, z \in [0,2]

    Find the volume delimited by the surface x^2+y^2=z^2, z \in [0,1]

    1. I used polar coordinates here.



    Shouldn't I use spherical coordinates since it has 3 variables ?(x y z).

    Later Edit: I forgot the Jacobian in the first example (which is r)

    2. Spherical coordinates: this i didn't got at all :-s



    I'm really a newbie at this, I could really use some help :-s.
    Last edited by Utherr; September 5th 2011 at 12:55 PM.
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