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    Question

    Present age of β€˜C’ is 20% more than that of β€˜D’.

    3 years ago, β€˜C’ was 1.4 times as old as β€˜D’. Find the present age of β€˜D’.
    A 3 years Correct Answer Incorrect Answer
    B 5 years Correct Answer Incorrect Answer
    C 6 years Correct Answer Incorrect Answer
    D 8 years Correct Answer Incorrect Answer

    Solution

    Let the present age of β€˜D’ be β€˜x’ years
    Therefore, present age of β€˜C’ = 1.2x years
    ATQ;
    (1.2x – 3) = 1.4 Γ— (x – 3)
    Or, 1.2x – 3 = 1.4x – 4.2
    Or, 1.2 = 0.2x
    Or, x = 6
    Therefore, present age of β€˜D’ = 6 years

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