Question
A 25 litre mixture of milk and water is in the ratio
4:1. If 5 litres of the mixture is removed and replaced with water, then the new ratio of milk to water becomes:Solution
Initial milk = 25 x 4/5 = 20 litres Initial water = 25 x 1/5 = 5 litres 5 litres of mixture removed: Milk removed = 5 x 4/5 = 4 litres Water removed = 5 x 1/5 = 1 litre Remaining: Milk = 20 - 4 = 16 litres Water = 5 - 1 = 4 litres Now 5 litres water added: Water = 4 + 5 = 9 litres New ratio = 16:9
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