Question

A and B are solutions of acid and water. The ratios of water and acid in A and B are 4:5 and 1:2, respectively. If x litres of A is mixed with y Litres of B, then the ratio of water and acid in the mixture becomes 8:13. What is x:y ?

A 5:6
B 2:5
C 3:4
D 2:3
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