SOLUTION: The ratio of mass of gold and copper in a jewellery piece is 5:8. if the mass of alloy is 18.2 kg , find the mass of gold in it.?
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Question 997497: The ratio of mass of gold and copper in a jewellery piece is 5:8. if the mass of alloy is 18.2 kg , find the mass of gold in it.?
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
Call the mass of gold x.
Since there is more copper, at a ratio of 8 to 5, the amount of copper is (8/5)x.
Added together, they have a mass of 18.2 kg. Thus
x + (8/5)x = 18.2
(13/5)x = 18.2 ==> 13/5 = 2.6
x = 18.2 / 2.6
x = 7 kg gold
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