Multiple Choice Questions on 2x 1 3x 5 then 5x 6x 2 20x 1 value is ........ for CDS Exam Preparation

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Multiple Choice Questions

2x 1 3x 5 then 5x 6x 2 20x 1 value is ........

Quantitative Aptitude (CDS) Simplification
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    2x+ 1/3x =5,then 5x /(6x^2 +20x +1) value is?

    1/7

    Correct Answer

    1/3

    Incorrect Answer

    1/2

    Incorrect Answer

    1/4

    Incorrect Answer
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    Explanation:

    2x+ 1/3x =5
     6x^2 +1 =15x ..equation 1
     5x/(6x^2 +20x +1)
     =5x/(15x +20x)
     =5x /(35x)
     =1/7

    By: bhavesh kumar singh
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