Measure your stride. 3 miles in 45 minutes is 4 miles per hour, which is 5.87 feet per second. If your stride is 2 feet long, you'll have to take close to three strides per second to achieve that rate.
30 miles an hour
About 7.8 miles per hour.
9.6 miles per hour.
2.8 miles in 50 minutes = 2.8*60/50 miles per 60 minutes = 3.38 miles per 60 minutes or 3.38 mph.
11/2 miles in 15 minutes = 6 mph
30 miles an hour
It is 6.8 miles per hour.
About 3.5 miles per hour.
11.2 miles per hour.
40.2 miles per hour.
About 7.8 miles per hour.
9.6 miles per hour.
2.8 miles in 50 minutes = 2.8*60/50 miles per 60 minutes = 3.38 miles per 60 minutes or 3.38 mph.
6.5 miles in 10 minutes is 39 miles per hour.
Three and half miles per 23 minutes. ;)
11/2 miles in 15 minutes = 6 mph
10 miles in 6 minutes = 10*10 miles in 6*10 minutes ie 100 miles in 60 minutes or 100 mph