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

  • question_answer
    When simplified \[(2.43\times 2.43+2.43\times \]\[7.57\times 2+7.57\times 7.57)\] is equal to__

    A) 10                                

    B) 100

    C) 101.89             

    D) 200.59

    Correct Answer: B

    Solution :

    \[{{(2.43)}^{2}}+2\times 2.43\times 7.57+{{(7.57)}^{2}}\] \[={{(2.43+7.57)}^{2}}\] \[={{(10.00)}^{2}}\] \[=100\]


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