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Manipal Medical Manipal Medical Solved Paper-2015

  • question_answer
    An athlete completes one round of a circular track of radius 10 m in 40 s. The distance covered by him in 2 min 20s is

    A) 110 m                                      

    B) 70 m

    C) 220 m                                      

    D) 140 m

    Correct Answer: C

    Solution :

    Time period = 40 s. No. of revolutions \[=\frac{Total\,\,time}{Time\,\,period}\]                                                 \[=\frac{140\,s}{40\,s}\]                                                 \[=3.5\] So, distance          \[=3.5\times 2\pi R\]                                \[=3.5\times 2\pi \times 10\]                                \[=220\,m\]


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