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How many liters of water must be evaporated from 50 liters of a 3% sugar solution to get a 5% sugar solution?

How many liters of water must be evaporated from 50 liters of a 3% sugar solution to get a 5% sugar solution? Correct Answer 20

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One Sugar Solution has 17% sugar. Another sugar solution has 7% sugar. How many liters’ of the second solution must be added to the 20L of the first solution to make a solution of 12 % sugar?
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