Speed is the rate of moving. The speed can be <span> calculated by dividing the distance traveled by the amount of time it took. speed= distance/time , v=d/t So,from Paul's average speed we can calculate how much distance he has passed after 3 hours. distance_3h=v*t=13.8 miles per hour * 3 hours distance_3h=41.4 miles
There are total 48 miles to the beach, so Paul have to go 48miles-distance_3h after his snack, which gives: 48-41.4=6.6 miles