Not so many years ago, running tracks in the United States were measured in yards. One lap was 440 yards, and 4 laps around was exactly 1 mile (1,760 yards). Today, most if not all tracks are metric- 1 lap = 400 meters.
400 meters = 437.4 yards, while 440 yards= 402.3 meters, so the metric mile (1,600 meters) equals 1,749 yards, about 11 yards short of 1 mile). Go
here for a quick conversion.
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