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

  • question_answer
    If each of the radii of base and height of a right circular cone is increased by 10%, then the percentage of increase in the volume of cone will be

    A) 20        

    B)  33.1

    C)  44.2    

    D)  100

    Correct Answer: B

    Solution :

    Volume of the cone \[=\frac{1}{3}\pi {{r}^{2}}h\] Effective change of 10% and 10% \[=\left( 10+10+\frac{10+10}{100} \right)%=21%\] Effective change of 21 % and 10% \[=\left( 21+10+\frac{21\times 10}{100} \right)%=33.1%\]


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