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SSC Sample Paper Mock Test-15 SSC CGL Tear-II Paper-1

  • question_answer
    A right circular cylinder just encloses a sphere of radius r. The ratio of the surface area of the sphere and the curved surface area of the cylinder is  

    A) 2 : 1     

    B)  1 : 2   

    C)  1 : 3    

    D)  1 : 1  

    Correct Answer: D

    Solution :

    Height of the cylinder = 2 r Curved surface area of the cylinder \[=2\,\,\pi RH\] \[\therefore \] Required ratio \[=4\pi {{r}^{2}}:2\pi \times r\times 2r=1:1\]


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