If we want the speed in mph we have to first convert the time into minutes to get rid of the fraction. 11 hours is 660 minutes. Add on 32 to get 692 minutes. So the speed in miles per minute is 711/692. This doesn’t reduce to a nice convenient fraction. We still need the speed in mph, so 711/692 miles a minute is 60 times this in mph: 711/692*60=61.65mph approx.