50 mph = 50 mi/hr 50 mi/hr * 4 hr =200 mi =200 miles
3 1/3 minutes
36 minutes.
Assuming there is no acceleration a vehicle going at the constant speed 50 mph, will take 4 hours to drive 200 miles.
Time = Distance / Speed so 200 miles / 55 mph = 3.63.. hours
2.6 hours.
speed divded by time
21 minutes
3 minutes
10 hours.
3 hours 4 minutes @65 mph
3 hours 20 minutes at 60 mph