SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-15

  • question_answer
    The outer and inner diameter of a circular pipe are 6 cm and 4 cm respectively. If the length is 10 cm, then what is the total surface area in square centimeters?     

    A) \[55\pi \]                                   

    B) \[110\pi \]

    C) \[150\pi \]                     

    D) None of the above

    Correct Answer: B

    Solution :

    Total surface area of the cylinder \[=\pi \,\,2h(R+r)+2\pi ({{R}^{2}}-{{r}^{2}})\] \[=2\pi \times 10\,(3+2)+2\pi ({{3}^{2}}-{{2}^{2}})\] \[=100\pi +10\pi =\,c{{m}^{2}}\]


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