12 hours
Six and a half hours.
16 hours, 57 minutes 17 hours would be 1020 miles.
The answer is incalculable because hours is a unit of time and miles is a unit of distance. If you are asking how many hours it would take you to drive 306 miles, you would have to include how fast you are going.
It would take 6 hours.
That would depend on the speed limit.
10 hours and 40 minutes
8 and 1/3 hours
28 hours and 20 minutes.
16 hours 25 minutes.
75
330 miles