# math

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 alloy?

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1. zinc : copper = 7:9
zinc/11.7 = 7/9
zinc = 11.7(7/9) = ....

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2. 11.7 × 7/9

=9.1 kg

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3. The ratio of zinc and copper in an alloy is 7:9. If the weight of copper in the alloy in the alloy is 11.7 kg. Find the weight of zinc in it

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