approx 6hours 4minutes 36.92seconds
The closer your actual average speed is to 65 mph,
the closer your actual time will be to this answer.
Time = Distance/Speed = 45/65 = 0.69 hours = 42 mintes, approx.
15mi/65MPH = .23 hr = 13.9 minutes.
about an hour
19.5 mins
It should take 3 hours at 65mph.
Time = Distance/Speed = 6.15 hours approx. This assumes that you can maintain an average speed of 65 mph for over 6 hours - quite an unlikely event.
20/65 = 18minutes 27.7seconds
3 hours 13 minutes.
4 hours 41.5 minutes.
4 hours 16 minutes.
9 minutes 13.84 seconds.
12 hours 2 minutes.