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Help on calculating surface area and volume of a cell???

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    Dimensions of Cell Surface Area Volume Surface Area to Volume Ratio
    5 mm x 5 mm x 5 mm 150 125 150:125 (150/125=6/5)
    2 mm x 3 mm x 4 mm 36 24 36:24 (36/24=3/2)

    above is what I think are the answers based on the table, I know that I got the surface area wrong, I'm not really sure how to find the surface area and volume of a cell... if anyone could help me with this it would be extremely helpful!
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    (Original post by Keedeon)
    Dimensions of Cell Surface Area Volume Surface Area to Volume Ratio
    5 mm x 5 mm x 5 mm 150 125 150:125 (150/125=6/5)
    2 mm x 3 mm x 4 mm 36 24 36:24 (36/24=3/2)

    above is what I think are the answers based on the table, I know that I got the surface area wrong, I'm not really sure how to find the surface area and volume of a cell... if anyone could help me with this it would be extremely helpful!
    5 x 5 x 5 is a cube. A cube has all square faces. Each face's area is 5 x 5 = 25. A cube has 6 faces, so 6 x 25 = 150 mm2. The volume is 5 x 5 x 5 = 125 mm3.

    See attached diagram for next cell.

    There are 6 faces to the 3d shape. Their areas are: (2 x 3) + (2 x 4) + (3 x 2) + (3 x 4) + (4 x 2) + (4 x 3) = 6 + 8 + 6 + 12 + 8 + 12 = 42 mm2.

    The volume is 2 x 3 x 4 = 24 mm2.
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    for the second volume wouldnt it be 52?? because 6 + 8 + 6 + 12 + 8 + 12 = 52 not 42?
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    (Original post by Keedeon)
    for the second volume wouldnt it be 52?? because 6 + 8 + 6 + 12 + 8 + 12 = 52 not 42?
    Sorry, my mistake!
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    its all good , thank you so much ! I was having so much trouble trying to figure out how to calculate the surface area and volume of a cell!! Thanks !!

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Updated: June 4, 2012
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