Question
The ratio of the present age of A to B is 5:7. After 6
years, the sum of their ages will be 72 years. Find the present age of A.Solution
Let the present age of A be 5x and the present age of B be 7x. After 6 years, their ages will be (5x + 6) and (7x + 6). The sum of their ages after 6 years = 72, so: (5x + 6) + (7x + 6) = 72, 12x + 12 = 72, 12x = 60, x = 5. Present age of A = 5x = 5 × 5 = 25 years.
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