Mr. Smith was driving 50 mph for the first two hours of his trip, then 60 mph for the remaining three hours. What was the average speed for the whole trip?
+23246 For the first two hours, he drove at 50 mph:
Distance = Rate x Time ---> Distance = 50 mph x 2 hrs = 100 miles
For the next three hours, he drove at 60 mph:
Distance = 60 mph x 3 hours = 180 miles
Total distance = 280 miles Total time = 5 hours
To find the average speed:
Distance = Rate x Time
280 mi = Rate x 5 hours (divide both sides by 5 hours)
56 mph = Rate
