How many liters of water must be evaporated from 50 liters of a 1-percent sugar solution to get a 10-percent solution?
Pick one:
A) 35	B) 40	C) 42	D) 45	E) 48

Rationale: 1 % of a 50 liter solution is 0.5 l 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 d .
Answer: D