Multiple Choice Questions on If x y 4 7 the value of x2 y2 x2 ndash y2 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

If x y 4 7 the value of x2 y2 x2 ndash y2 ........

Quantitative Aptitude ( CCS) Ratio, Proportion
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    If x:y = 4:7, the  value of (x2 + y2) /(x2 – y2) = ?

     

    -33/65
     

    Incorrect Answer

    65/33
     

    Incorrect Answer

    33/65
     

    Incorrect Answer

    -65/33

    Correct Answer
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    Explanation:

    X = 4a; y = 7a
    (x2 + y2) /(x2 – y2) = (4a)2 + (7a)2/ (4a)2 – (7a)2
    = a2(16+49)/ a2(16-49)
    = -65/33

    By: Sandeep Dubey
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