- A small plane flying into the wind takes 3 h 20 min to complete a flight of 960 Km. Flying with the wind, the same plane takes 2 h 30 min to make the trip. What is the speed of the wind? What is the speed of the plane?
- A hovercraft travels over flat land at 40 km/h and over rough water at 10 km/h. If it takes 5.75 h to travel over 185 km, then how far did it travel over land, and water.
- In a white water relay race, one kayak team averaged 26 km/h downstream, but only 6 km/h upstream in the white water course. What was the rate of the kayak in still water? What was the rate of the current?