Two trains leave a station at the same time. One travels north on a track at 70 mph. The second travels east on a track at 97 miles per hour. How fast are they traveling away from one another in miles per hour when the northbound train is 350 miles from the station?
The distance is increasing at a rate of ? miles per hour.
Two trains leave a station at 12:00 noon. One travels north on a track at 80 mph. The second travels east on a track at 75 miles per hour. At 1:00 PM the northbound train stops for one-half hour at a station while the eastbound train continues at 75 miles per hour without stopping. At 1:30 PM the northbound train continues north at 80 mph. How fast are the trains traveling away from one another at 4:00 PM?
The distance between the trains is increasing at ? miles per hour.
