an alloy of zinc and copper contains 25% of zinc . find the weight of copper in 40kg of alloy.
please explain
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Step-by-step explanation:
Total weight of alloy = 20 kg
Weight copper = 20 x 45% = 20 x 45/100 = 9 kg
Weight of zinc = (total weight of alloy – weight of copper) = 20 – 9 = 11 kg
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