It depends on how fast you are moving. If you are going 65 mph, the actual driving time (not including speed changes, stops or delays) would be: 12 hours 55 minutes 23 seconds.
840/70 = 12 hours.
The shortest driving distance is 840 miles.
The driving distance is about 840 road miles and the driving time is approximately 13.5 hours.
840 miles and 14.5 to 15.5 hours driving time on I-95 S.
840 miles about 12-13 hours
840 meters is 0.52 miles.
840 minutes is equivalent to 14 hours.
http://www.infoplease.com/ipa/A0001801.html
It is 840 miles according to Google Maps.
about 840 miles
About 840 miles
The driving distance between Denver, CO and Mandan, ND is 890 miles. The driving time would be approximately 14 hours if driving non-stop in good conditions. (The driving time does not take into consideration conditions such as weather, road work and rush hour traffic in urban areas.)