0.138 mi/min (miles per minute)
8.27 mph (miles per hour)
32 mph
120 mph
56 mph
6.29*60/25 = 15.096 mph
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.
If you went at a speed of a mile a minute, or 60 mph, you would travel 25 miles in 25 minutes. For 10 miles in this time you only have to travel at 2/5 of that speed, or 24 mph.
158.8mph for 343 miles in 2hours and 16 min
1 mile in 4 minutes = 15 miles per hour
6.2 mph!
Speed = Distance / Time = 28 miles / 30 minutes = 56 miles per hour - on average.