A train left for Houston, and 5 hours later, a car traveling 74 mph tried catching up to the train. After8 hours, the car caught up. What was the train's average speed?
train speed = x
car = 74
train head start = 5 x
closing speed = car - train = 74 - x
closing speed for 8 hours covers the head start distance 5x = (74-x) 8 solve for x = 45.53 m/hr