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SSC Sample Paper Mock Test-10 SSC CGL Tear-II Paper-1

  • question_answer
    The volumes of two spheres are in the ratio 8 :1 The ratio of their surface areas is

    A)  4 : 9    

    B)  2 : 3

    C)  4 : 5    

    D)  5 : 6  

    Correct Answer: A

    Solution :

    Let the volumes be \[8{{x}^{3}}\] and \[27{{x}^{3}}\] \[\therefore \] Their radius are \[2x\] and \[3x\] \[\therefore \] The ratio of their surface area \[=4{{x}^{2}}:9{{x}^{2}}=4:9\]


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