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SSC Sample Paper Mock Test-16 SSC CGL Tear-II Paper-1

  • question_answer
    A right circular cylinder tunnel of diameter 2 m and length 40 m is to be instructed from a sheet of iron. The area of the iron sheet required in \[{{\text{m}}^{2}}\] is

    A)  \[40\,\pi \]

    B)  \[60\,\pi \]   

    C)  \[80\,\pi \]        

    D)  \[100\,\pi \]

    Correct Answer: C

    Solution :

    Area of iron sheet required = Curved surface area of tunnel \[=2\pi rh=(2\times \pi \times 1\times 40)\,{{\text{m}}^{2}}=80\pi \,\,{{\text{m}}^{2}}\]


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