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Question

An alloy contains 40% copper, 32% nickel, and the rest zinc. find the mass of zinc in one kilogram of the alloy.


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Solution

Step1. Calculation of percentage of zinc

Percentage of zinc =

=100%(40%+32%)=28%

Step2. Calculation of mass of zinc in one kilogram of the alloy

Mass of zinc in 1kg of alloy =28%of1kg

=28100×1000g

=280g

Hence, the mass of zinc in one kilogram of the alloy 280g.


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