Question

A tin of grey paint contains a mixture of black and white paint in the ratio of 5:15 .what percent its black? If we require 3.5 litres of this mixture,then how much white paint will be required

Answer 1

black paint : white paint = 5 : 15

sum of ratio = 5 + 15 = 20

so percent of black paint = 5/20 × 100

= 5 × 5% = 25%

now if the quantity is 3.5 litres if the mixture.

then the quantity of white paint = 15/20 × 3.5 litres

= 2.625 litres

Answer 2

This is the answer with full solving.