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    Question

    4 years ago ratio of the ages of the two persons A and B

    was 5:2. 2 years hence the ratio of their ages will be 8:5. Find the present age of B.
    A 20 years Correct Answer Incorrect Answer
    B 8 years Correct Answer Incorrect Answer
    C 15 years Correct Answer Incorrect Answer
    D 10 years Correct Answer Incorrect Answer

    Solution

    4 years ago, Let A’s age be 5x and B’s age be 2x. According to the question, 2 years hence, => (5x + 6)/(2x + 6) = 8/5 => 25x + 30 = 16x + 48 => x = 2 Present age of B = 2x + 4 = 2 × 2 + 4 = 8 years

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