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SSC Sample Paper SSC (Group-C) Sample Test Paper-9

  • question_answer
    A right circular cylindrical tunnel of diameter 5m and length 10m is to be constructed from a sheet of iron. The area of iron sheet required will be :

    A)  \[52\,\pi \] square metre

    B)  \[50\,\pi \] square metre

    C)  \[51\,\pi \] square metre

    D)  \[49\,\pi \] square metre

    Correct Answer: B

    Solution :

     Surface area of cylindrical tunnel \[=2\pi rh\] \[=\left( 2\times \pi \times \frac{5}{2}\times 10 \right)\,sq.\,m.=50\pi \,sq.\,m.\]


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