A contains 30 L of pure milk. A certain quantity of water was added to it to make the ratio of milk and water 3 : 1. Some quantity of mixture was removed and 6 L of water were added to it. If the quantity of water is 8 L less than that of milk in the resultant mixture then what is the ratio of milk and water in the resultant mixture?
1
13 : 21
2
21 : 13
3
31 : 13
4
13 : 31