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Railways Quantitative Aptitude Basic Calculations Sample Paper Square Roots & Cube Roots Sample Test Paper-5

  • question_answer
    The volumes of two cubes are in the ratio 343 : 1331, the ratio of their edges, is

    A)  7 : 10  

    B)  7 : 11

    C)  7 : 12  

    D)  None of these.

    Correct Answer: B

    Solution :

    [b] Let volume of cubes \[={{a}^{3}}\] and \[{{b}^{3}}\] \[\therefore \,\,\,\frac{{{a}^{3}}}{{{b}^{3}}}=\frac{343}{1331}={{\left( \frac{7}{11} \right)}^{3}}\] \[\frac{a}{b}=\frac{7}{11}\] or a : b = 7 : 11


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