Tips & Tricks Ratio of milk and water in a mixture is = 4x : 3x According to the question 4x/(3x + 2) = 8/7 ⇒ 4x × 7 = 8 (3x + 2) ⇒ 28x = 24x + 16 ⇒ 28x – 24x = 16 ⇒ 4x = 16 ⇒ x = 16/4 ⇒ x = 4 Quantity of mixture in the last = (4x + 3x) = 7x = 7 × 4 = 28 litres Quantity of mixture in the last = 28 + 2 = 30 litres