A) 10

C) 13.8

D) 15

The mixture of milk and water=10 litres+10 litres=20 liters

So the milk-water ratio is 1:1

Son takes 15litres of mixture i.e. 7.5 litres milk + 7.5litres water

Where water =7.5 litres

After adding 5 liters of water, water in the mixture= 7.5 + 5 = **12.5 liters**

**Related MCQs:**

- In a mixture of 60 liters, the ratio of milk and water is 2:1. What amount of water must be added to make the ratio of milk and water as 1:2?
- A man is 24 years older than his son. In two years, his age will be twice the age of his son. What is the present age of his son?
- In a 60-liter mixture, ratio of milk and water is 2:1. How much water must be further added to make it 1:2?
- A farmer divides his herd of cows among his four sons so that the first son gets one-half of the herd, the second son one-fourth, the third son one-fifth, and the fourth son 7 cows. the total number of cows in the herd is?