What quantity of water should taken out to concentrate 12 liters of 40% acidic liquid to 60% acidic liquid? Answers
A) 4liters	B) 10liters	C) 15liters	D) 8liters	E) 6liters
Required answer is = 12(60-40)/60 = 4 liters   4litersnswer is 4liters
<result>A</result>
What quantity of water should taken out to concentrate 12 liters of 40% acidic liquid to 60% acidic liquid?