A drum contains 80 litres of ethanol. 20 litres of this liquid is removed and replaced with water. 20 liters of this mixture is again removed and replaced with water. How much water (in litres) is present in this drum now?
A. 45
B. 40
C. 35
D. 44
Answer: Option C
This Question Belongs to Arithmetic Ability >> Alligation
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