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Math Help - 4.5 Litre

  1. #1
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    4.5 Litre

    Not sure how to approach this question. If i filled a 4.5 litre bottle with pennys how much would be in there.

    Any help appreciated?
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  2. #2
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    Quote Originally Posted by craig_r View Post
    Not sure how to approach this question. If i filled a 4.5 litre bottle with pennys how much would be in there.

    Any help appreciated?
    You'd need to find the volume of a penny which is V = \frac{\pi D^2h}{4}

    where
    • V = Volume
    • D = Diameter
    • h = thickness


    Once you know the volume of a penny you can do

    n = \frac{4.5 \times 10^6}{V}

    to get the number of pennies (n). That formula only works for measuring the penny's thickness and diameter/radius in mm

    Bear in mind this will be an overestimate because it does not account for gaps between the pennies.
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