How much water be mixed in 36 litre of milk worth Rs 5 00 per litre so that value of mixture is Rs 3...........

Explanation:

Milk            water

 5                   0

         3.60

3.60              1.20

Ratio of Milk to water will be= 18:6,
In 18 litre milk water added = 6 litre
In 1 litre milk water added = 6 / 18
In 36 litre milk water added = (6/18) x 36 = 12 litres

Hence, option 2 is the correct answer.