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    Question

    The ratio of the present ages of Ginni and Binni is 9:2

    respectively. Ginni is ‘n’ years older than Binni. If after 5 years, the ratio of the ages of Binni to Ginni is 1:2, then find the value of √(n+9).
    A 3 Correct Answer Incorrect Answer
    B 5 Correct Answer Incorrect Answer
    C 4 Correct Answer Incorrect Answer
    D 8 Correct Answer Incorrect Answer

    Solution

    Let the present ages of Ginni and Binni be 9x and 2x respectively. Here, n = 9x – 2x = 7x According to the question, => (9x + 5)/(2x + 5) = 2/1 => x = 1 Now, n = 7x = 7 Required value = √(n+9) = √(7+9) = √16 = 4

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