Running Math

1 km = 2.5 track laps

10 km = 25 track laps
10 km = 6.21 miles

7.21 min/mile = 4.5 min/km
4.5 min/km / 2.5 laps/km = 1.8 min/lap = 108 seconds/lap

END GOAL: run 25 track laps, taking 1m48s to complete each one

No big deal right?