If you maintained an average speed of 70 mph, the time to drive 313 miles would be about 4 hours and 28 minutes. You would have to add time for stops, detours and other delays.
67miles divided by 70 miles per hour will give you the fraction of an hour =0.957143Multiply this by 60 to get minutes = 57minutes (&25 seconds)you can also do the reverse, 70mph = 70/60mintes =...
