Question

An alloy consists of 30% copper,40%zinc and the remaining is nickel.find the amount of nickel in 20kilograms of the alloy

Answer 1

total alloy is 100%

therefore to find amount of nickel:

100%-(30%+40%)=30% of nickel

Now, to find amount of nickel:

therefore 30% of the alloy(20 kg)

30/100*20=6

Therefore there is 6 kg of nickel in 20 kg of alloy