How many liters of water must be evaporated from 50 liters of a 1-percent sugar solution to get a 10-percent solution?
Choose the correct choice from the following choices:  A) 35  B) 40  C) 42  D) 45  E) 48
1% of a 50 liter solution is 0.5L which is 10% of the solution at the end.   The solution at the end must be 5 L.   We need to evaporate 45 liters.   The answer is 45.
<result>D</result>
How many liters of water must be evaporated from 50 liters of a 1-percent sugar solution to get a 10-percent solution?