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    Question

    The sum of the present age of 'T' and 'O' is 60 years. The

    ratio of the age of 'T' and 'O' before 10 years is 3:5 respectively. Find the age of 'O' after 10 years.
    A 50 years Correct Answer Incorrect Answer
    B 65 years Correct Answer Incorrect Answer
    C 45 years Correct Answer Incorrect Answer
    D None of the above Correct Answer Incorrect Answer

    Solution

    Let the age of 'T' and 'O' before 10 years be 3x years and 5x years.

    So, the present age of 'T' = (3x + 10) years

    So, the present age of 'O' = (5x + 10) years

    So, 3x + 10 + 5x + 10 = 60

    Or, 8x = 60 - 20 = 40

    So, 'x' = 5

    So, present age of 'O' = 5x + 10 = 25 + 10 = 35 years

    Therefore, required age = (5 X 5 + 10 + 10) = 45 years

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