To convert feet to miles you divide by 5280. So 50/5280=0.0094697 you now have miles per second so you need to convert seconds into hours. To do this you multiply by 3600 because there are 60 seconds in a minute and 60 minutes in one hour. 60x60=3600
3600x0.0094697=34.09090909
To the nearest hundredth is 34.10 miles per hour