Question

40 litres of a mixture of milk and water contains 10% of water, the water to be added, to make the water content 20% in the new mixture is:

Answer 1

The amount of water in the mixture is :

10/100 × 40 = 4 litres

The amount of milk is :

90/100 × 40 = 36 litres

The ratio is 9 : 4

If the water percentage becomes 20% then the amount of water will be :

10% —> 4 litres

20% —>?

20/10 × 4 = 8litres

The amount to be added is :

8 - 4 = 4 litres