Two trains left Frog City at the same time. One traveled north at 70 miles pe hour, the other traveled east at 50 miles per hour. How far apart were the trains at the end of THREE hours?

After three hours, the train traveling north at 70 miles per hour will have covered 210 miles (70 mph x 3 hours). Meanwhile, the eastbound train, moving at 50 miles per hour, will have traveled 150 miles (50 mph x 3 hours). To find the distance between the two trains, you can use the Pythagorean theorem since they form a right triangle. So, the distance apart is √(210² + 150²) = √(44100 + 22500) = √(66600) = approximately 258.17 miles. The two trains are about 258.17 miles apart after three hours of travel!