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  4. Quantitative Aptitude
  5. Basic Calculations

Railways Quantitative Aptitude Basic Calculations Sample Paper Square Roots & Cube Roots Sample Test Paper-5

  • question_answer
    The area of a circular play ground is \[\frac{3168}{7}{{m}^{2}}.\] The diameter of the ground is

    A)  12 m   

    B)  22 m    

    C)  24 m   

    D)  6 m

    Correct Answer: A

    Solution :

    [a] \[Area\,\,=\,\,\pi {{r}^{2}}=\frac{3168}{7}\] \[{{r}^{2}}=\frac{3168}{7}\times \frac{7}{22}=144\] \[r=\sqrt{144}=12m\] Diameter = 24 m


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