Average speed = Total distance / Total time
Total time = 1 hour 20 minutes = 1 + 20/60 = 1.33 hours
Total distance = 84 km
Average speed = 84 km / 1.33 hours
Average speed = 63.16 km/h
Therefore, the average speed of the man is 63.16 km/h.
A man travels a distance of 84km in 1hr 20 mins. Find it's average speed
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