An alloy consists of 30% copper and 40% zinc and the remaining is nickel. Find the amount of nickel in 20 kilograms of the alloy.
Total alloy be 100kg
Then copper =30kg
Zinc =40kg
Nickel =100−(40+30)=30kg
100→30
1→30100
20kg=30×20100=6
6 kg of nickel is present in20 kg of alloy.