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  • Question
  • The wheel of a motorcycle 70cm in diameter makes 40 revolutions in every 10sec.What is the speed of motorcycle n km/hr?


  • Options
  • A. 13.68kmph
  • B. 31.68kmph
  • C. 41.68kmph
  • D. 45.68kmph

  • Correct Answer
  • 31.68kmph 

    Explanation

    In this type of question, we will first calculate the distance covered in given time.

     

    Distance covered will be : Number of revolutions x Circumference 

     

    So we will be having distance and time, from which we can calculate the speed. 

     

    Radius of wheel = 70 / 2 = 35 cm

     

    Distance covered in 40 revolutions will be  40 * c i r c u m f e r e n e = 40 * 2 ?r = 40 * 2 * 22 7 * 35 = 8800 cm  = 88 m

     

    Distance covered in 1 sec  =  88 10 = 8 . 8 m / s = 8 . 8 * 18 5 k m / h r = 31 . 68 k m / h r

     

     

     

     

     

     

     

     

  • Tags: Bank Exams, Bank PO

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