10. A freight train leaves a station and travels at a rate of 30 miles per hour. Two hours later, an express train leaves the same station traveling in the same direction at a rate of 50 miles per hour. In how many hours will the express train
overtake the freight train?

4 hours

Step-by-step explanation:

We can already assume that the freight train is 60 miles ahead of the express. If the freight is going at a constant of 30 mph and the express goes 50 mph then we can say that when the freight train has been gone for 6 and the express for 4 the express will have passed the freight. The reason as to why would be that 60 + 120 = 180 or 60 + (30 x 4) = 180 and 50 x 4 = 200 .

Sorry if that explanation doesn't make sense but I hope this helped.