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SSC Sample Paper SSC CGL - Sample Paper-1

  • question_answer
    A cube of edge 5 cm is cut into cubes each of edge of 1 cm. The ratio of the total surface area of one of the small cubes to that of the large cube is equal to

    A)  1 : 125            

    B)  1: 5

    C)  1: 625             

    D)  1: 25

    Correct Answer: D

    Solution :

    Surface area of a small cube \[=6\times {{(edge)}^{2}}=6\times 1=6\,c{{m}^{2}}\] Surface area of the large cube \[=6\times {{(5)}^{2}}=6\times 25\,\,c{{m}^{2}}\] \[\therefore \] Required ratio \[=\frac{6}{6\times 25}=\frac{1}{25}\] i.e., 1: 25


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