Depending on which route you take - Google Earth cites a minimum distance of 399 miles (6 hours 467 mins) and a maximum of 427 miles (6 hours 26 mins)
5-6 hours
6 hours 6 minutes.
71.1667
6/8 = 3/4 hours
6 hours
About 6 hours, around 550 miles.
6 or 7 hours.
About 6 hours
6 hours 46 minutes.
373 miles at 60 miles per hour would take 6 hours 13 minutes.
time = distance / speed = 30 miles / (6 miles/hour) = 5 hours.