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When doing the math, here is the facts that you would need in order to calculate: 1 Mile = 1609.344 Meters(about 4 laps)13mph = 20921.472 meters an hour(about 52 laps, and 121 meters) so 20921.472 meters per 3600 seconds set up a ratio (20921.472/3600) = (400/X) ---> X is how long it would take you to run the 400, in seconds. cross multiply (20921.472 * X) = (3600 * 400) you get (20921.472 X = 1440000) now x = (1440000/20921.472) and you get 68.83s or 1:08.83

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16y ago

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