1) If one-third of a tank holds 80 litres of water, then the quantity of water that half of the tank holds is : A) 80/3 litres B) 100 litres C) 120 litres D) 240 litres Answer: Option CExplanation:Let x be the total capacity of the tankFrom question, we get,80 = (x / 3)Therefore x = 240 litresSo, half of tank capacity = 120 litres