Two trains set off simultaneously towards each other from two cities. The speed of the first train is 85 km / h

| January 12, 2021 | education

Two trains set off simultaneously towards each other from two cities. The speed of the first train is 85 km / h and the speed of the second is 60 km / h. 3 hours after departure, the distance between trains was 290 km. Find the distance between these cities. How many hours after the train departs.

1. According to the condition of the problem, it is given: two trains were moving towards each other at a speed of 85 km / h for the first, 60 km / h for the second, while after 3 hours there was 290 km between them.
2. It is known that the distance is equal to the product of speed and time during which it is covered.
Let’s calculate the path length of the first train:
85 km / h * 3 h = 255 km.
3. Let’s determine how many kilometers the second train traveled:
60 km / h / 3 h = 180 km.
4. Let’s calculate what is the distance between cities:
255 km + 180 km + 290 km = 725 km.
5. Find out the sum of the speeds of both trains:
85 km / h + 60 km / h = 145 km / h.
6. Let’s find the time after which they will meet:
725 km: 145 km / h = 5 hours.
Answer: There are 725 km between cities, trains will be on the way for 5 hours before the meeting.



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