Ryan rides his bike home at 20 mph and will be traveling 10 miles to get there. He leaves at 4 PM, what time will he arrive home?
Ryan will arrive home at 4:30 PM.
To calculate this, you divide the total distance, 10 miles, by the speed, 20 mph, to find out how long it will take to travel that distance.
10 miles / 20 mph = 0.5 hours
Add this to his starting time of 4:00 PM and you get:
4:00 PM + 0.5 hours = 4:30 PM
So Ryan will arrive home at 4:30 PM.