It will take about 8 hours of total driving timeat a constant 70 mph. Your total travel time will be longer if you slow down or stop along the way.
One hour
4.57 hours
11 hours 30 minutes.
2.814 hours (rounded)
1hr 25mins
27 minutes.
http://www.wolframalpha.com/input/?i=200+miles+at+70mph
1 and half hours
2 hours 1 minute
1 hour 20 minutes.
at 70mph on the highway it'll take you right at 2hr
21 hours, 25 minutes, 42.86 seconds