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    Question

    The present ages of 'A' and 'B' are in the ratio of

    6:7. 20 years ago, A's age was 50% less than B's age at that time. Find the difference between their present ages.
    A 4 years Correct Answer Incorrect Answer
    B 8 years Correct Answer Incorrect Answer
    C 6 years Correct Answer Incorrect Answer
    D 7 years Correct Answer Incorrect Answer

    Solution

    Let the present age of 'A' and 'B' be '6x' years and '7x' years, respectively. ATQ; (6x - 20) = 0.5 X (7x - 20) Or, 6x - 20 = 3.5x - 10 Or, 2.5x = 10 Or, x = 4 So, required difference = 7x - 6x = x = 4 years

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