6 years ago ratio of the ages of the two persons A and B was 5:2. 4 years hence the ratio of their ages will be 7:4. Find the present age of B.
6 years ago, Let A’s age be 5x and B’s age be 2x. According to the question, 4 years hence, => (5x + 10)/(2x+10) = 7/4 => 20x + 40 = 14x + 70 => x = 5 Present age of B = 2x + 6 = 2 × 5 + 6 = 16 years
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