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Railways Sample Paper RRB (Group D) Sample Test Paper-13

  • question_answer
    If \[\sqrt{1+\frac{x}{9}=\frac{13}{3},\,}\]then the value of x

    A)  \[\frac{1439}{9}\]        

    B)  160

    C)  \[\frac{1443}{9}\]        

    D)  169

    Correct Answer: B

    Solution :

    [b] \[\sqrt{1+\frac{x}{9}}=\frac{13}{3}\] Squaring on both sides, \[1+\frac{x}{9}=\frac{169}{9}\] \[\Rightarrow \,\,\,\frac{x}{9}=\frac{169}{9}-\,1=\frac{160}{9}\] \[\Rightarrow \,\,\,x=160\]


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