Question

The ratio of zinc and copper in an alloy is7:9.if the weight of copper in the alloy is 12.6kg.find the weight of zinc in it

Answer 1

weight of zinc=10.6

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Answer 2

let x is included in the ratio 7x and 9x
a.q , 9x=12.6 kg
x = 1.4
so 7x=7×1.4=9.8 kg so weight of the zinc =9.8kg