It depends how fast you are driving.
About 30 minutes on the US Interstate highway system.
45 miles is about 28 miles, so about 30 minutes on an interstate, and less on smaller roads.
51.5 minutes.
About 19 minutes
About 6 minutes
One hour if cruising on the German Autobahn in your Ferrari at 139 miles per hour. Two hours & 14 minutes if traveling on an USA Interstate Highway at 65 miles per hour.
At 30 mph it takes 40 minutes to drive 20 miles.
With the right vehicle on a closed course it might be done in one hour. On the modern Interstate highway system in the US, that distance should be covered in three hours (180 minutes.)
At 60 mph, you can drive 10 miles. At 30 mph, you can drive 5 miles.
You drove 34 miles in 30 minutes at 68mph
33.43 minutes
Five minutes at 60 mph