An airplane is flying toward you at a constant elevation. When you first sight it, it is at an angle of elevation of 20 degrees to the horizontal. You take a second sighting 10 minutes later and it is at 39 degrees to the horizontal. Assuming it is at a cruising altitude of 35,000 feet, how fast is the plane moving?
Don't tell me the answer, just let me know how to solve this problem? Cause I have no idea where to start or what to do.
Don't tell me the answer, just let me know how to solve this problem? Cause I have no idea where to start or what to do.