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    Question

    Present age of 'X' is 60% more than that of 'Y'. Present

    age of 'Z', who is 5 years older than 'Y', is 25 years. After how many years from now, ratio of ages of 'X' to 'Y' will become 7:5.
    A 10 yrs Correct Answer Incorrect Answer
    B 12 yrs Correct Answer Incorrect Answer
    C 18 yrs Correct Answer Incorrect Answer
    D 24 yrs Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Present age of 'Y' = 25 тАУ 5 = 20 years
    Present age of 'X' = 1.6 ├Ч 20 = 32 years
    Let the required time be 'T' years.
    So, (32 + T) : (20 + T) = 7 : 5
    Or, 5 ├Ч (32 + T) = 7 ├Ч (20 + T)
    Or, 160 + 5T = 140 + 7T
    Or, 2T = 20
    Or, 'T' = 10 years

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