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    Can't work out the answer to this one. Any help appreciated.

    6 An open cylindrical container made from sheet metal of uniform thickness has a mass of
    800 g. When completely filled with water the total mass is 15.6 kg.
    What would be the total mass of a cylindrical container full of water made from the same
    sheet metal (of the same thickness) but with double the diameter and double the height?
    A 118.4 kg
    B 121.6 kg
    C 124.8 kg
    D 128 kg
    E 131.2 kg

    Thank you!
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    Lengths are doubled, so the volume is 2^3 = 8 times more...
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    Thanks,

    I did 14.8kg x 8
    then 800g x 4
    to give me a final answer of 121.6kg, which I checked the answer key, is right.
 
 
 
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