The ratio of copper and zinc in an alloy is 3 : 4. If the total weight of the alloy is 30.8 kg, find the
weight of zinc in the alloy.
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Answer:
let the retio=x
the ratio of copper=3x
the ratio of zinc in alloy=4x
according to the question
total weight=30.8kg
copper + zinc in alloy=30.8
3x+4x=30.8
7x=30.8
x=30.8/7
x=4.4
weight of zinc in the alloy= 4x
=4×4.4
=17.6kg
weight of opper= 3x
=3×4.4
=13.2
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