How much water be mixed in 36 litre of milk worth Tk. 4.80 per litre, so that value of mixture is Tk. 3.60 per litre?

Question: How much water be mixed in 36 litre of milk worth Tk. 4.80 per litre, so that value of mixture is Tk. 3.60 per litre?

Solution:

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) × 36 = 12 litres