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

  • question_answer
    A roller of diameter 70 cm and length 2 m is rolling on the ground. What is the area covered by the roller in 50 revolutions?   

    A)                  180 sq m

    B)  200 sq m

    C)  220 sq m

    D)  240 sq m

    Correct Answer: C

    Solution :

    The radius of roller is 0.35 m. The area covered in one revolution = Curved surface area of roller \[=2\times \frac{22}{7}\times 0.35\times 2=4.4\,\,\text{sq}\,\,\text{m}\] \[\therefore \] Total area covered in 50 revolutions \[=4.4\times 50=220\,\,\text{sq}\,\,\text{m}\]


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