Question

A statue of 80 kg Contains 60% copper and 15% zinc remaining aluminium after melting if 5% aluminium is removed find the quantity of aluminium required to make the statue?

Answer 1

%of aluminium=100-(%of copper+%of zinc)
=100-(60+15)
=100-75
=25
if 5% aluminium is removed
=20%
20%of 80kg
80×20/100
16kg
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