Two trains traveling on parallel tracks are going toward each other from a distance of
558 miles. If the freight train is moving at 40 mph and the passenger train is moving at
53 mph, when will the trains pass each other?
Two trains except to pass each other in ___ hours.
Dennis and Chris Reed leave simultaneously from the same point hiking in opposite directions, Dennis walking at 4 miles per hour and Chris at 3 mph. How long can they talk on their walkie-talkies if the walkie-talkies have a 15 mile radius?