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# Stuck in a GCSE Maths Question watch

1. Hi, I've been set homework to complete practice paper and stumbled across this question which I can't seem to understand.

Question:
a) An alloy is made from a mixture of gold and silver. The density of gold is 19.3 g/cm³ and the density of silver is 10.5 g/cm³. Explain why the percentage of the mass of the allow that is gold will be different from the percentage of the volume that is gold.

b) A ring is made from the alloy. The mass of the ring is 10g and its volume is 0.6 cm³. Use algebra to show that about 70% of the volume of the ring is gold.

Thank you very much.
2. A)mass and volume are different,as the mass of the gold is heavier it will weigh more but it will still take up the same space, let’s say the volume is 1m cubed for gold and silver gold will have a higher mass because it’s more dense meaning it weights more?
3. (Original post by recklessabandon)
A)mass and volume are different,as the mass of the gold is heavier it will weigh more but it will still take up the same space, let’s say the volume is 1m cubed for gold and silver gold will have a higher mass because it’s more dense meaning it weights more?
Ahhh yes makes sense because mass is density X volume, thank you

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Updated: March 11, 2018
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