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Railways R.R.C. (Kolkata) Solved Paper Held on 2nd Shift 9-11-2014

  • question_answer
    The mean proportional of 4 and 64 is?     

    A) 16                                

    B) 34            

    C) \[\sqrt{68}\]                  

    D) 60          

    Correct Answer: A

    Solution :

    The mean proportion \[=\sqrt{4\times 64}\] \[=\sqrt{256}\] \[=16\]


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