13.311. Two trains, a passenger train and an express train, set off towards each other simultaneously from two points that are 2400 km apart. Each train travels at a constant speed, and at some point in time, they meet. If both trains had traveled at the speed of the express train, they would have met 3 hours earlier than the actual meeting time. If both trains had traveled at the speed of the passenger train, they would have met 5 hours later than the actual meeting time. Find the speeds of the trains.