Question

3. A tin of grey paint contains a mixture of black and white paint in the ratio of 5: 15. What per cent of paint is black? If we require 3.5 L of this mixture, then how much white paint will be required?​

Answer 1

Answer:

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

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