Vessel X initially contains a mixture of milk and water in the ratio 5 : 4 5:4 5 : 4 . When $9$ litres of this mixture is taken out, $20$ litres of an...
Question
Vessel X initially contains a mixture of milk and water in the ratio . When $9$ litres of this mixture is taken out, $20$ litres of another mixture from vessel Y, which has milk and water in the ratio , is added to the remaining mixture in vessel X. After this operation, the ratio of milk to water in vessel X becomes . What was the initial quantity of the mixture in vessel X?