Question
120 litres mixture (milk + water) contains 36 litres water.
Find the quantity of mixture that must be removed so that quantity of milk becomes 42 litres in the mixture.Solution
Initial quantity of milk = 120 - 36 = 84 litres
Ratio of quantity of milk and water respectively = 84:36 = 7:3
Let the required quantity of mixture be 'y' litres.
So, 84 - (7y/10) = 42
Or, (7y/10) = 42
Or, 'y' = 60
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