What quantity of water should taken out to concentrate 24 liters of 40% acidic liquid to 60% acidic liquid? Answers
A) 5 liters	B) 10 liters	C) 15 liters	D) 8 liters	E) 6 liters

Rationale: "required answer is = 24 ( 60 - 40 ) / 60 = 8 liters answer is d"
Answer: D