The ratio of zinc and copper in an alloy is 7:9. If the weight of the copper in the alloy is 11.7 kg, find the weight of zinc in the alloy.
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Answer:
weight of zinc = 7x
weight of copper = 9x
weight of copper = 11.7 kg
9x= 11.7
x=11.7/9
x= 1.3
weight of zinc = 7x = 7*1.3 = 9.1 kg
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