The ratio of the present ages of A and B is 3 : 4 3:4 3 : 4 . X X X years ago, the ratio of their ages was 5 : 7 5:7 5 : 7 . After X X X years from no...
Question
The ratio of the present ages of A and B is . years ago, the ratio of their ages was . After years from now, the sum of their ages will be $48$. What is the present age of B?