Question
A vessel contains 45 litres of a milk-water mixture in
the ratio 4 : 1. How much water should be added to make the ratio of milk to water 3 : 2?Solution
Milk = (4/5) × 45 = 36 litres Water = (1/5) × 45 = 9 litres Let x litres of water be added. Then, 36 / (9 + x) = 3 / 2 72 = 27 + 3x 45 = 3x x = 15 Hence, the correct answer is 15 litres.
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