About 51 minutes.
18 hours
At 60 miles per hour, six hours. At 30 miles per hour, twelve hours.
0.0833... hours.
at 60 miles per hour it is 21.25 hours
716/60 = 11.93 hours
At 60 miles per hour, 9.383 hours.
At 1 mile per hour it is 55 hours, at 2 miles an hour it is 27.5 hours at 5 miles an hour it is 11 hours at 55 miles an hour it is 1 hour at 60 miles an hour it is 55/60 hour or 55 minutes at 120 miles an hour it is 27.5 minutes at 550 miles an hour it is 6 minutes etc
3.7167 hours (3 hours 43 minutes).
4.033 hours or 4 hours and 2 minutes
104/60 = 1.7333 hours (rounded, repeating) = 1hour 44minutes
1500/60=25 hours
3.47 hours.