Correct Answer - Option 1 : 6 Litres
Given:
Total solution of milk and water = 54L
Ratio of milk and water = 3 : 6
New ratio of milk and water = 2 : 3
Calculation:
Volume of milk = (3/9) × 54L = 18L
Volume of water = (6/9) × 54 = 36L
Let the new volume of milk added be x litre
⇒ (18 + x)/36 = 2/3
⇒ 54 + 3x = 72
⇒ 3x = 18
⇒ x = 6
∴ 6 Litres of milk must be added to make the ratio of milk and water 2 : 3.