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Railways R.R.C. (Mumbai) Solved Paper Held on 2-11-2014 - I

  • question_answer
    The distance between two points (0, -5) and (x,0) 13 units, then x is equal to?                  

    A) ±10                             

    B) ±12            

    C) (c)\[-10\]                                   

    D) None of these    

    Correct Answer: B

    Solution :

    \[\sqrt{{{(0-x)}^{2}}+{{(-5-0)}^{2}}}=13\] \[{{x}^{2}}+25=169\] \[{{x}^{2}}=169-25\] \[=144\] \[x=\pm \,\,12\]


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