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SSC Sample Paper Mock Test-14 SSC CGL Tear-II Paper-1

  • question_answer
    The outer and inner diameters of a circular pipe are 6 cm and 4 cm, respectively. If its length is 10 cm, then what is the total surface area (in sq cm)?

    A)  \[100\,\,\pi \]

    B)  \[110\,\,\pi \]

    C)  \[115\,\,\pi \]

    D)  \[119\,\,\pi \]

    Correct Answer: B

    Solution :

    Given, R = 3 cm. r = 2 cm, A = 10 cm Total surface area \[=2\pi \,\,(R+r)\,\,(R+h-r)\] \[=2\pi \,\,(3+2)(3+10-2)=110\pi \]sq cm


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