Question 1084960
6 miles / 11 mph=6/11 hours total trip time.
3 miles / 3 mph=1 hour travel time
Next 3 miles @ 23 mph=3/23 hours travel time
Total time for uphill and downhill route:1-3/23 hours
6 miles/1&3/23 mph=5.3076923 mph average over total trip
More time is lost on the uphill trip, which depresses the average. &#9786;&#9786;&#9786;&#9786;