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प्रश्न
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?
संख्यात्मक
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उत्तर
Composition of the alloy = 15 parts of tin + 105 parts of copper
= 120 parts
\[ \therefore \text{ Percentage of tin }= \frac{15}{120} \times 100\]
\[ = 12 . 5 \% \]
\[\text{ Also, percentage of copper }= \frac{105}{120} \times 100\]
\[ = 87 . 5 \%\]
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