SOLUTION: A solution of 60 Litre contains 40l water and 20 Litre alchohol.How much solution we have to increase so that the precentage of alchohol becomes 50%?

Question 1043403: A solution of 60 Litre contains 40l water and 20 Litre alchohol.How much solution we have to increase so that the precentage of alchohol becomes 50%?
Answer by ikleyn(52786) (Show Source): You can put this solution on YOUR website!
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A solution of 60 Litre contains 40 L water and 20 Litre alcohol.
How much alcohol we have to add so that the percentage of alcohol becomes 50%?
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20 L of alcohol. It is clear without solving equations.

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