SSC Sample Paper Mock Test-9 SSC CGL Tear-II Paper-1

  • question_answer
    The volume of two hemisphere are in. the ratio 8 : 27. What is the ratio of their radii?

    A) 2 : 3     

    B)  3 : 2    

    C)  1 : 2    

    D)  2 : 1

    Correct Answer: A

    Solution :

    Let volume be \[{{V}_{1}}\] and \[{{V}_{2}}.\] \[\therefore \]      \[{{V}_{1}}:{{V}_{2}}=8:27\] \[\Rightarrow \]\[\frac{2}{3}\pi r_{1}^{3}:\frac{2}{3}\pi r_{2}^{2}=8:27\] \[\Rightarrow \]\[=r_{1}^{3}:r_{2}^{3}=8:27\]\[\Rightarrow \]\[{{r}_{1}}:{{r}_{2}}=2:3\]


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