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    Question

    A is younger than B by 4 years. If the ratio of A and B

    ages is 9:10 respectively, then find the age of A.
    A 21 years Correct Answer Incorrect Answer
    B 30 years Correct Answer Incorrect Answer
    C 25 years Correct Answer Incorrect Answer
    D 36 years Correct Answer Incorrect Answer

    Solution

    If B’s age be x years, then A’s age be (x - 4) years. According to question, => (x – 4)/x = 9/10 => 10x – 40 = 9x => x = 40 Therefore A's age = 40 – 4 = 36 years

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