3.5 seconds in the 30 yard dash equals 17.53 miles per hour.
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(50 yards/6.6 seconds) x (3,600 seconds/hour) / (1,760 yards/mile) = 15.496 miles per hour (rounded)
The sprinter's speed is 22.53 miles per hour.
There are 3600 seconds in an hour. Therefore going at 3600 miles per hour is equivalent to 1 miles per second.
1 miles = 5280/3 yards = 1760 yards. 50 yards / 1760 yards/mile ~= 0.02841 miles 7.2 seconds / 3600 seconds/hour ~= 0.002 hours 0.02841 miles / 0.001833 hours ~= 14.2 miles per hour In general divide 102.27 by your time in seconds to get mph.
feet per minute equals 60 seconds divided by 15 equals 4. 4 X 300 feet = 1200 feet per minute 1200 X 60 minutes in one hour = 72,000 ft. in one hour Now translate feet into miles One mile = 5280 feet 72000 divided by 5280 = 13.6 miles per hour