I'd need more information about how much fuel your engine uses in the average hour at what speed to answer your question.
12 hours 27 minutes - assuming you're driving at a constant speed.
It will take about 11 hours and 32 minutes of total driving time if you drive non-stop at a constant speed of 65 mph.
About 9 hours 35 minutes at a constant 60 mph.
It will take about 16 hours and 55 minutes of total driving time if you drive non-stop at a constant speed of 65 mph.
It will take about 2 hours and 52 minutes of total driving time if you drive non-stop at a constant speed of 65 mph.
If you drive non-stop at a constant speed of 65 mph, it will take about 11 hours and 50 minutes of total driving time.
If you drive non-stop at a constant speed of 65 mph, it will take about 8 hours and 12 minutes of total driving time.
It will take about 8 hours and 33 minutes of total driving time if you drive non-stop at a constant speed of 65 mph.
It takes about 4 hours and 36 minutes of total driving time if you drive non-stop at a constant speed of 65 mph.
About 3 hours 40 minutes. This assumes you travel at a constant speed with no stops.
It will take about 7 hours and 41 minutes of total driving time at a constant 65 mph. Add some time for stops and delays.
The time it takes to drive 20 miles depends on the speed at which you are driving. If you are driving at a constant speed of 40 miles per hour, it would take you 0.5 hours to drive 20 miles (20 miles / 40 miles per hour = 0.5 hours). If you are driving at a constant speed of 60 miles per hour, it would take you 0.33 hours to drive 20 miles (20 miles / 60 miles per hour = 0.33 hours).