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Help.....density problem...?

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Can anyone help me out with this pls????

A rectangular block of ice containing a fossil measures 42cm x 26cm x 15cm and has a mass of 21800g. The Density of ice is 0.917g/cm^3; the density of the fossil contained in the ice is 3.64g/cm^3. What percentage of the block's total mass is the fossil?

I've found the density of the block but i just dont know what the question means. Please help?

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  1. Its a proportion question

    The total mass of the block is made from some % fossil, some % ice

    You know the density of the block and the density of each of the components

    Density of block= X% * Density of ICE + (1-X%) * Density of Fossil

    Now just solve for X

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