Friday, 19 December 2008

Brain teaser 18 (solution)

Suppose the distance is 60 km.
Then it would take him 2 hours to get to work and 3 hours to come back.
Since the total journey is 120 km and the total time is 5 hours, the average speed is 120 km divide by 5 hours, that is, 24 km/h!

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