Question

In a mixture of milk and water of volume 30 litres.
the ratio of milk and water is 7.3. Find the quantity
of water to be added to the mixture to make the ratio
of milk and water 1:2.

Answer 1

A mixture of 30 litres contain milk and water in the ratio of 7:3. Let the rational between milk and water mixture be x. Thus, there is 7x = 7 × 3 = 21 litres milk and 3x = 3 × 3 = 9 litres water. The partial ratio of milk and water is 5:4 and 45 litres of mixture are taken out and 15 litres of water is added.