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SSC Sample Paper Mock Test-17 SSC CGL Tear-II Paper-1

  • question_answer
    \[\left[ \frac{{{(0.73)}^{3}}+{{(0.27)}^{3}}}{{{(0.73)}^{2}}+{{(0.27)}^{2}}-(0.73)\times (0.27)} \right]\]simplifies to

    A) 1

    B)  0.4087

    C)  0.73    

    D)  0.27    

    Correct Answer: A

    Solution :

    Let 0.73 = a and 0.27 = b \[\therefore \]      Given expression \[=\frac{{{a}^{3}}+{{b}^{3}}}{{{a}^{2}}+{{b}^{2}}-ab}\] \[=\frac{(a+b)({{a}^{2}}+{{b}^{2}}-ab)}{{{a}^{2}}+{{b}^{2}}-ab}=a+b=0.73+0.27=1\]


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