It will take about 7 hours and 15 minutes of total driving time at a constant 70 mph. Add some time for stops and delays.
4.57 hours
One hour
11 hours 30 minutes.
1hr 25mins
2.814 hours (rounded)
27 minutes.
1 and half hours
http://www.wolframalpha.com/input/?i=200+miles+at+70mph
1 hour 20 minutes.
2 hours 1 minute
7 hours 8 minutes.
21 hours, 25 minutes, 42.86 seconds