Question
The present ages of A and B are in the ratio 7:9. After
8 years, their ages will be in the ratio 9:11. What is A's present age?Solution
Let present ages be 7x and 9x. After 8 years: (7x + 8)/(9x + 8) = 9/11 11(7x + 8) = 9(9x + 8) 77x + 88 = 81x + 72 16 = 4x x = 4 So A's present age = 7x = 28 years
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