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Math Help - check my work- simple math

  1. #1
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    check my work- simple math

    solve for h.
    V= 75cm^3
    diameter= 108 cm
    radius=54 cm

    V=3.14 r^2 h

    This is what I did, but I don't think its right. Can someone please correct my work.
    75=3.14 (54^2) h
    75/(3.14* 54^2)= h
    h= .008 cm

    why does this seem wrong? can someone please correct it?
    -Thanks!
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  2. #2
    Moo
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    Hello,

    Quote Originally Posted by alyal View Post
    solve for h.
    V= 75cm^3
    diameter= 108 cm
    radius=54 cm

    V=3.14 r^2 h

    This is what I did, but I don't think its right. Can someone please correct my work.
    75=3.14 (54^2) h
    75/(3.14* 54^2)= h
    h= .008 cm

    why does this seem wrong? can someone please correct it?
    -Thanks!
    Is it a cone or a cylinder ?

    If it's a cylinder, then your working is correct
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  3. #3
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    Assuming you're trying to find the height of a cylinder...

    (54^2)pi = cross-sectional area = 2916pi

    75/2916pi = h = 0.008cm

    So yes, your answer is correct.
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  4. #4
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    Quote Originally Posted by Moo View Post
    Hello,
    Is it a cone or a cylinder ?
    Its neither. It is an M&M, but I was told to use this formula for it
    I guess it is a sphere..?
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  5. #5
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by alyal View Post
    Its neither. It is an M&M, but I was told to use this formula for it
    I guess it is a sphere..?
    If you are using that formula it is a cylinder.

    -Dan
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  6. #6
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    Quote Originally Posted by alyal View Post
    Its neither. It is an M&M, but I was told to use this formula for it
    I guess it is a sphere..?
    The volume formula you have is the formula for a cylinder, which I guess tentatively speaking an m&m constitutes a cylinder.
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  7. #7
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    so I guess the M&M is a cylinder.
    Thanks for all your help!
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