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SSC Sample Paper SSC CGL - Sample Paper-26

  • question_answer
    In the equation \[(x/21)\times (x/189)=1,\] which of the following number will replace both the x?

    A) 21                                

    B) 63

    C) 3969                            

    D) None of these

    Correct Answer: B

    Solution :

    \[\because \] \[\frac{x}{21}\times \frac{x}{189}=1\] \[\Rightarrow \]   \[{{x}^{2}}=21\times 189\] \[\Rightarrow \]   \[x=\sqrt{21\times 21\times 3\times 3}\]             \[=21\times 3=63\]


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