How many liters of water must be evaporated from 50 liters of a 2-percent sugar solution to get a 10-percent solution?	Choose one
A) 25 B) 30 C) 35 D) 40 E) 45
2% of a 50 liter solution is 1L which is 10% of the solution at the end.   The solution at the end must be 1 L.   We need to evaporate 40 liters.   The answer is 40.
<result>D</result>
How many liters of water must be evaporated from 50 liters of a 2-percent sugar solution to get a 10-percent solution?