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Question
The ratio of zinc and copper in an alloy is 7 : 9. If the weight of copper in the alloy is 11.7 kg find the weight of zinc in it.
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Solution
Let the weight of zinc be x kg.
Ratio of zinc and copper = 7:9
Weight of copper in the alloy = 11.7 kg
7 = x
9 11.7
⇒ x = 11.7 × 7 = 81.9 = 9.1
9 9
Weight of zinc = 9.1 kg
Ratio of zinc and copper = 7:9
Weight of copper in the alloy = 11.7 kg
7 = x
9 11.7
⇒ x = 11.7 × 7 = 81.9 = 9.1
9 9
Weight of zinc = 9.1 kg
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