44. A barrel contains 25 liters of a solvent mixture that is 40% solvent and 60% water. Lee will add pure solvent to the barrel, without removing any of the mixture currently in the barrel, so that the new mixture will contain 50% solvent and 50% water. How many liters of pure solvent should Lee add to create this new mixture?

Answer and Explanation

Your Answer is

Correct Answer is G

Explanation

The water content remains the same, a total of 25*60% = 15 liters, need to add 15-25*40% = 5 liters