Correct Answer - Option 2 : 100 litre
Given:
The ratio of milk and water = 3 : 1.
The capacity of a can = 50 litre
Calculation:
Quantity of milk in a can = 50 × (3/4) = 150/4 = 37.5 litre
Quantity of water in a can = 50 - 37.5 = 12.5 litre
As per question we need to add water to get quantity = 1 : 3
⇒ 37.5/(12.5 + x) = 1/3 , (cross multiple)
⇒ 112.5 = 12.5 + x
⇒ 112.5 - 12.5 = x
⇒ x = 100
∴ The quantity of water that has to be added further is 100 litre