What quantity of water should taken out to concentrate 15 liters of 40% acidic liquid to 60% acidic liquid?
Choose one.
A) 5liters	B) 10liters	C) 15liters	D) 8liters	E) 6liters
Required answer is = 15(60-40)/60 = 5 liters   5litersnswer is 5liters
<result>A</result>
What quantity of water should taken out to concentrate 15 liters of 40% acidic liquid to 60% acidic liquid?