There are three vessels A, B and C having milk to water ratio as 3: 5, 1:3 and 7: y. After adding mixture of vessel B to A, the milk to water ratio becomes 1 : 2 in A. now 60% of mixture is taken out from vessel A and mixture of vessel C is mixed with remaining mixture of vessel A which results in final milk to water ratio of 3:4. find the value of y given that volume of B is 20 Itrs and volume of C is (7+ y ) Itrs. (a) 1 (b) 4 (c) 5 (d) 3 (e) 2