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

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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.
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Answer add