A milkman has 20 litres of pure milk. Find the quantity (in litres) of water to be added to it so that he gets 50% profit by selling it at its cost price.

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A milkman has 20 litres of pure milk. Find the quantity (in litres) of water to be added to it so that he gets 50% profit by selling it at its cost price.

Simran Sharma 16th Dec, 2019

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SAKSHI KULSHRESHTHA 16th Dec, 2019

Let cost price (CP) of 1 litre milk be x.

Total CP = 20x

Profit = 50% of 20x = 10x

So total money earned = Total CP+Profit = 20x+10x = 30x

Now, milk is sold at its CP.

So amount of milk sold = 30x/x = 30 litres

Actual amount of milk = 20 litres

So amount of water added = 30-20 = 10 litres

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