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Math Help - Parallelepiped

  1. #1
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    Parallelepiped

    Help please!

    A parallelepiped has a square base area of 90 and volume 660. Find the total area of the parallelepiped, the face diagonal and the diagonal of the parallelepiped.

    Hmm, is that a cube? If not, what? how do i solve? Thanks
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  2. #2
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    More information please

    Hello reiward
    Quote Originally Posted by reiward View Post
    Help please!

    A parallelepiped has a square base area of 90 and volume 660. Find the total area of the parallelepiped, the face diagonal and the diagonal of the parallelepiped.

    Hmm, is that a cube? If not, what? how do i solve? Thanks
    It certainly won't be a cube (where all the faces are squares), but it might be a cuboid (where some faces are rectangles). But unless you're told this, there's no way that you can calculate the area of the faces. So we need more information, I'm afraid.

    Grandad
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  3. #3
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    If it is a cuboid, how do I do it?
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  4. #4
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    Hello reiward
    Quote Originally Posted by reiward View Post
    If it is a cuboid, how do I do it?
    If it's a cuboid, then the vertical faces are all rectangles with height \frac{660}{90}= 7.333 (3 d.p.) Can you take it from there?

    Grandad
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