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A solution has 15% sugar. Another solution has 5% sugar. How many liters of the second solution must be added to 20 liters of the first solution to make a solution of 13% sugar?

A solution has 15% sugar. Another solution has 5% sugar. How many liters of the second solution must be added to 20 liters of the first solution to make a solution of 13% sugar? Correct Answer 5 liters

Let y liters of the second solution must be added.

Then, /(20 + y) = 13

On solving, we get y = 5 litres

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