Question 979389: There are 2 runners. One runs 15.15 miles in 2 hours and 37 minutes with a pace of 10:23 minutes/mile. The other runs 15 miles in 2 hours and 27 seconds with a pace of 10:28 minutes/mile. How it this possible? Can the extra .15 miles account for the 5 second difference in pace?
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! If I edit the second part to 2 hours and 27 minutes, I get a pace of 9.8 minutes per mile or 9:48, not 10:28. The first pace is accurate to run 15.15 miles at 10:23 minutes per mile.
They have two different speeds per mile: one runs a mile in an average of 10:23, the other in 10:28. The pace is an equivalent way of saying what their average speed is. It has nothing to do with distance other than longer distances will slow the pace should the distance be beyond an individual's capability to maintain the average speed.
If the question were that one runner does 15 miles in 2h27m and another 15.15 miles in 2h37m, do they have the same pace, then it isn't clear what the average speed is until one divides distance by time. If anything, one is running a longer distance faster than the other, who is running a shorter distance.
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