Railways Sample Paper RRB (Assistant Loco Pilot & Technician) Sample Test Paper-5

  • question_answer
    If a number is multiplied by three-fourth of itself, the value thus obtained is 10800. What is that number?

    A)  210                             

    B)  180

    C)  120                 

    D)  160

    Correct Answer: C

    Solution :

     Let the number be \[x.\]      \[\therefore \] \[x\frac{3x}{4}=10800\] \[\Rightarrow \] \[{{x}^{2}}=\,\frac{10800\,\,\,\,4}{3}=14400\] \[\therefore \]   \[x=\sqrt{14400}\,\,=120\]

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