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:**

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- 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 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?