Question

If the alloy of metal contains 45% nickel, 25% copper and rest is zinc, then the weight of zinc in 3 kg alloy is

Answer 1

According to the question,

Let the alloy contains $45\%$ nickel, $25\%$ copper and

rest in zinc.

$Zn=100-45-25$

$=30\%$

Since $1kg=1000gm$

Therefore,

$45\times 1000=450gofNi$;

$25\times 1000=250gofCu$,

$30\times 1000=300gofZn$

Hence, $3kg$

$3000g\times 3=900gofZn$ present in 3 kg of alloy.