Question
Quantity of water in a 420 litres mixture (Milk + Water)
is 20 litres less than the quantity of milk in it. Find the quantity of water to be mixed so that the quantity of milk in the mixture becomes 50% of the whole mixture.Solution
Quantity of water in the mixture = {(420 - 20)/2} = 200 litres
So, quantity of milk in the mixture = (420 - 200) = 220 litres
Total quantity of the mixture if quantity of milk in the mixture becomes 50% = 220 × (100/50) = 440
So, quantity of water needs to be mixed = (440 - 420) = 20 litres
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What will come in place of the question mark (?) in the following series?
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