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    Subject

    Quantitative Aptitude

    Topic

    Solution

    What is the value of x if 4/x + 3/5 = 10/x, then x=?

    ক)
    50
    খ)
    12
    গ)
    40
    ঘ)
    10

    Explanation

    4/x + 3/5 = 10/x or, (20 + 3x)/5x = 10/x or, 20x + 3x2 = 50x or, 3x2 - 50x + 20x = 0 or, 3x2 - 30x = 0 or, 3x(x – 10) = 0 Now, Either, 3x = 0 x = 0 Or, x – 10 = 0 x = 10

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