Use the formula:
V=D/T
Where V= Velocity
D= Distance
T = Time
So solving for T
T = D / V
T = 715miles / 65 Mph
T = 11 hours
About 2.40 hours
175 miles at 65 miles per hour would be 2.69 hours
12 hours
About 5 hours and 42 minutes, depending on how fast you drive.
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.
That would depend on the speed limit.
8 and 1/3 hours
10 hours and 40 minutes
16 hours 25 minutes.
28 hours and 20 minutes.