If you use MS Excel, first calculate the MINUTES (3hr 27min = 207min). Dividing the total minutes by the miles (26.2) gives you the minute per mile number (see first number below 207). The number that follows after that is the percentage of the minute that will give you the seconds per mile (thus 7.900763 = 7:54, appx). Adding up 7:54 (26 times) will give you 3hr and 24 min (appx). If you figure that the ".2" portion of 26.2 is equal to 1/20 of the 7.900763 number, then it gives you 1.580153. Next, take the .580153 and multiple that by "60" to get the seconds and you end up with 1:34 (appx). Add that in, and you end up with 3:26:58, which is appx 3hr and 27min. Thus you're APPROXIMATE run time is 7:54 / mile. 207 0:07:54 7.900763 1.580153 0:07:54 54.04578 34.80918 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:07:54 0:01:34 3:26:58
To cover three miles in 27 minutes (or less), you must maintain an average speed of 6.5 miles per hour.
To cover 26 miles in 4.25 hours, you need to run at approximately 6.11764706 mph, but for general purposes 6.12 miles per hour should be close enough.
If you have to cover 21 miles in 21 minutes, then you need to cover 1 mile every minute. There are 60 minutes in an hour, so if you kept that up for an hour, you'd cover 60 miles.
8.35 miles per hour
3 miles an hour
42.86 miles per hour.
If my calculations are right you need to travel 20 miles per hour to reach ten miles in thirty minutes.
32 mph
16,666
5.8646 mph
120 mph
56 mph
158.8mph for 343 miles in 2hours and 16 min