To find the distance of the swimming event, you can subtract the distance of the running event from the total distance of the race.
Total distance of the race: 7.13 miles
Distance of the running event: 6.2 miles
Distance of the swimming event = Total distance - Distance of the running event
Distance of the swimming event = 7.13 miles - 6.2 miles
Distance of the swimming event = 0.93 miles
So, the distance of the swimming event was 0.93 miles.