A man travelled from place A to B at an average speed of 30 mph and returned along the same route at an average speed of 60 mph. Find the appropriate average of the total journey.SOLUTIONHarmonic Mean =

Question

It is problem of statistics as my background is not that good for statistics as I’m medical student kindly help me with this.

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Other Kaka khan 3 months 1 Answer 81 views 0

Answer ( 1 )

  1. Let the distance between A and B is x.

    so the time taken to go from A to B = x/30

    Similarly, the time taken to travel from B to A = x/60.

    Total Time taken is = x/30 + x/60 = 3x/60 = x/20

    Total distance traveled = x+x = 2x.

    So average speed = 2x/(x/20) = 40 mph.

     

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