SSC Sample Paper Mock Test-11 SSC CGL Tear-II Paper-1

  • question_answer
    A right triangle with sides 3 cm, 4 cm and 5 cm is rotated about the side 3 cm to form a cone. The volume of the cone so formed is

    A)  \[16\pi \,\,\text{c}{{\text{m}}^{3}}\]

    B)  \[12\pi \,\,\text{c}{{\text{m}}^{3}}\]

    C)  \[15\pi \,\,\text{c}{{\text{m}}^{3}}\]

    D)  \[20\pi \,\,\text{c}{{\text{m}}^{3}}\]

    Correct Answer: A

    Solution :

    Clearly, r = 4 cm, h = 3 cm \[\therefore \] Volume of cone \[=\frac{1}{3}\pi {{r}^{2}}h=\frac{1}{3}\pi \times 16\times 3=16\pi \,\,\text{c}{{\text{m}}^{3}}\]


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