It would take 3 hours... to drive for 3 hours. Of course, if you mean 45 mph for 3 miles then it would take just over 2 minutes of consistent 45 mph to go 3 miles.
If you drive 65 MPH it will take 6.154 hours.If you drive 55 MPH it will take 7.273 hours
Two hours at 60 mph
3.26 hours.
18.5 hours @70 mph
It depends on your average speed. At 60 mph, you can drive 600 miles in ten hours. At 30 mph, it will take you 20 hours.
That depends on how fast you drive. At 70 mph average, that will take 1:57 hours. At 55 mph average, that will take 2:28 hours.
To find out how long it will take to drive 470 miles at 40 mph, divide 470 by 40. The answer is 11.75 hours or 11 hours and 45 minute.
23.81 hours if you average 60 mph.
33 hours @65 mph
At 60 MPH average, about 5.5 hours.
At an average 60 mph: 50 hours
If you drive at an average of 50 mph, it will take you 28.5 hours. At 60 mph, it will take you 23 hours and 45 minutes. The faster you go the less time it will take.