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Percentages

An alloy of t...

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?

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Solution

In an alloy, Number of parts of tin=15

and number of parts of copper =105

Total parts =15+105=120

$∴$ Percentage of copper in the alloy

$= \frac{105}{120} \times 100 = 87.5 %$

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