Question
A container has 80 litres of milk and water in the ratio
3:1. If 20 litres of the mixture is removed and replaced with 20 litres of water, what will be the new ratio of milk to water?Solution
ATQ, Initially: Milk = (3/4)×80 = 60, Water = (1/4)×80 = 20 Removed 20 litres mixture: Milk removed = (3/4)×20 = 15, Water removed = (1/4)×20 = 5 Left: Milk = 60−15 = 45, Water = 20−5 = 15 Add 20 litres water: Water = 15+20 = 35 New ratio = 45:35 = 9:7
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