Think up a task in which it is necessary to point to oncoming traffic a) time prior to a meeting b) speed of one of moving objects c) initial distance between them

From two cities between which distance of 560 km, at the same time towards each other there were two trains. Speed is one 52 km/h. What speed of the second train if they met in 5 hours of Resheniye: 52*5 = 260 km there passed the first train 560-260 = 300 km there passed the second train 300:5 = 60 km/h the speed of the second train.
Answer add