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Railways Sample Paper RRB (Group D) Sample Test Paper-12

  • question_answer
    If \[{{1}^{3}}+{{2}^{3}}+.......+{{9}^{3}}=2025,\]then the approx. value of \[{{(0.11)}^{3}}+{{(0.22)}^{3}}+.......\text{ }+{{(0.99)}^{3}}\] is

    A)  0.2695

    B)  0.3695

    C)  2.695  

    D)  3.695

    Correct Answer: C

    Solution :

    [c] \[{{(0.11)}^{3}}\,\,({{1}^{3}}+{{2}^{3}}+.....+{{9}^{3}})\] \[=0.001331\times 2025\] \[=\frac{1331}{40000}\approx 2.695\]


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