21 miles / 55 mph = 0.38 hours, or 23 minutes
Exactly 1 hour
About 8 hours 30 minutes at a constant 55 mph.
2.55hours. Divide 140 by 55.
It will take about 1 second at 55 mph.
36 minutes.
80.455 hours
45 min
24 minutes.
It will take 39 minutes 16 seconds to go 36 miles at 55 miles per hour
Time = Distance / Speed so 200 miles / 55 mph = 3.63.. hours
24 mi / 55 mph = .436 hr = 26.2 min