Question

An alloy of tin and copper consists of 15 parts of tin and 105 parts of copper. Find the percentage of copper in the alloy?

Answer 1

In an alloy,

 Amount of tin = 15 part 

Amount of copper = 105 part 

Total weight of alloy = 15+105 = 120

 Hence, 

Percentage of copper in alloy =\(\frac{105}{120}\times100\) \(=\frac{525}{6}\) =87.50%