23.33333 hours
20 minutes
Divide the distance by the speed.
20/90 = 2/9 of an hour
At 85 MPH average, about 1 hr 9 min.
168 / 90 = 1.86 hours = 1 hour 51 mins 36seconds
90/75 = 6/5 = 1.2 hours = 1hr 12min
4 hours 6 minutes.
2 hours, 46 minutes, 40 seconds
Driving time at 65 mph would be 1 hour 23 minutes.
21 minutes and 20 seconds.
How long dose it take to go 20 miles at 90 mph