Question
A solution contains alcohol and water in the ratio 5:2.
If 25% of the solution is replaced with the same amount of water, what will be the new ratio of alcohol to water?Solution
ATQ, Let the total quantity of solution be 7x litres. Alcohol = 7x × (5/7) = 5x litres Alcohol left after removing 25% = 5x × 0.75 = 3.75x litres Water = 7x - 3.75x = 3.25x litres So, required ratio = 3.75x : 3.25x = 15 : 13
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