It will take about 5 hours and 51 minutes of total driving time at a constant 70 mph. Add some time for stops and delays.
One hour
4.57 hours
11 hours 30 minutes.
1hr 25mins
2.814 hours (rounded)
27 minutes.
http://www.wolframalpha.com/input/?i=200+miles+at+70mph
1 and half hours
1 hour 20 minutes.
2 hours 1 minute
7 hours 8 minutes.
at 70mph on the highway it'll take you right at 2hr