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The ratio of copper and zinc in an alloy...

The ratio of copper and zinc in an alloy is 9:7. If the weight of zinc in the alloy is 9.8kg, find the weight of copper in the alloy.

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An alloy of copper and zinc.

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The ratio of zinc and copper in an alloy is 7:9. It the weight of the copper in the alloy is 11.7 kg,find the weight of the zinc in the alloy.

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