- 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?
If you understand none of the problem then in most cases we won't be able to help you because teaching a new topic takes a lot of time, typing and patience. Also you should only post 1 problem per thread and try to show some work. If you can't do anything, post your thoughts on what you get stuck on.
Relative velocity in two dimensions is all about giving each vector a direction. If the two vectors (like wind velocity and plane velocity) go in the same direction, then the individual velocities are added. If they go in opposite directions they are subtracted and go in the direction of the larger vector.
Also use:
Distance = Rate x Time
That's the info you need to use but again we can't teach you, only help you.