Divide 249 miles by 70 Miles/hour to get 3.557142857 hours.
175 miles at 65 miles per hour would be 2.69 hours
At 60 miles per hour it would take about 4 hours.
At 60 miles an hour, 4. At forty miles an hour, 6.
12 hours
21 hours.
That would depend on how fast the airplane is flying. If the plane is flying 425 miles per hour it would take 1 hour. At 212.5 miles per hour it would take 2 hours.
Six and a half hours.
At least eight hours.
9 hours 20 minutes.
3 hours and 7minutes
16 hours, 57 minutes 17 hours would be 1020 miles.