540 miles per hour
10 miles.
20 mph. At that speed, in one hour you would travel 20 miles. After half an hour of traveling at that speed, you would have gone 10 miles.
You can travel 2.375 miles.
Your average speed is 44.3 miles per hour.
Nine miles per hour.
Then your speed is 42 miles per hour
20.36 miles per hour.
The number of miles you would travel in 8 minutes would depend on the speed you are traveling. At 60 miles per hour, you would travel 8 miles in 8 minutes.
less than two 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.
A speed of 90 miles per 75 minutes or 72 miles per 60 minutes. If you must have it in more conventional form, then 72 mph.
14 hours 44 minutes.