Question

an alloy of tin and copper consists of 15 parts of tin and 105 pats of copper. find the percentage of copper in the alloy?

Answer 1

Answer:

87.5%

Step-by-step explanation:

Total parts = 15 + 105 = 120 Parts

Copper is 105 parts of 120 Parts.

In % = 105/120 x 100 = 87.5%

Answer 2

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$Total\:number\:of\:parts\\\\=15+105\\\\=120\\\\Parts\:of\:copper\\\\=105\\\\So,\\\\According\:to\:the\:question,\\\\Percentage\:of\:copper\\\\=\frac{105}{120}\times100\\\\=\frac{105}{12}\times10\\\\=87.5\%\\\\\boxed{\boxed{The\:percentage\:of\:copper\:in\:the\:alloy\:=87.5\%}}$