# Ring

The ring made from gold and copper alloy has a weight of 14.5 g and a volume of 1.03 cm3. How much gold and how much copper it contains?
The metal densities are Au 19.3 g/cm³ and Cu 8.94 kg·dm-3

Correct result:

a =  9.8583
c =  4.6417

#### Solution:

a+c = 14.5
a/19.3 + c/8.94 = 1.03

a+c = 14.5
0.051813a+0.111857c = 1.03

a = 9.858276
c = 4.641724

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