From a barrel having 36 litres alcohol, 6 litres are drawn and replaced with water. Then, 12 litres of the mixture is replaced with water. Then, 18 litres of the mixture is replaced with water. Find the final quantity of alcohol in the barrel (in litres).
Help us build a Free and Comprehensive Preparation portal for various competitive exams by providing us your valuable feedback about Apti4All and how it can be improved.