Question

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

Answer 1

Copper is 40%
Nickel is 32%
Zinc will be 28%(100-40-32)
mass of zinc=280 gms or 0.28kg

Answer 2

Copper=40%,nickel=32%

Zinc=100-(40+32)100-72=28

amount of zinc=1kg of 28/100

100 of 28/100=280gram