A ship travels 200 miles at 25 mph, then 150 miles at 30 mph. What is the average speed for the entire trip?
Answer
26.67 mph
How to solve it
1
Leg 1: 200 miles ÷ 25 mph = 8 hours
2
Leg 2: 150 miles ÷ 30 mph = 5 hours
3
Total distance: 200 + 150 = 350 miles
4
Total time: 8 + 5 = 13 hours
5
Average speed: 350 ÷ 13 ≈ 26.67 mph
Hints
Calculate time for each leg
Find total distance and time
Average = total distance ÷ total time