Lots Of Adulteration :o

Algebra Level 4

A barrel is completely filled with water. 27 litres of water is removed from it and an equal quantity of milk is added. It is stirred properly and 27 litres of the mixture is removed. An equal quantity of milk is again added so that the barrel is still completely full. Now, if the milk and water in the barrel are found to be in the ratio 9:16, find the capacity of the barrel (in litres).

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