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 & explanation
Correct answer: option 2
Number of parts of tin=15
Number of parts of copper =105
Total parts =15+105=120
∴ Percentage of copper in the alloy = \(\frac{105}{120}\) × 100 = 87.5%