Question

В одном городе два вокзала:Северный и Южный,расстояние между которыми 15 км.Одновременно с этих вокзалов выехали в противоположных направлениях два поезда.Северный поезд шел со скоростью 45 км/ч и через 4 часа приехал в город С.Южный поезд,проехав 212 км ,приехал в город Ю.Какого расстояние между городам С и Ю?

Answer 1

15+45*4+212=15+180+212=195+212=407(км)

Answer 2

Problem Analysis

We have two train stations, the Northern and Southern stations, with a distance of 15 km between them. Two trains depart simultaneously from these stations in opposite directions. The Northern train travels at a speed of 45 km/h and arrives in city S after 4 hours. The Southern train travels a distance of 212 km and arrives in city Y. We need to find the distance between cities S and Y.

Solution

To find the distance between cities S and Y, we need to calculate the distance traveled by the Southern train.

Let's start by calculating the time it took for the Northern train to reach city S. We know that the speed of the Northern train is 45 km/h and it traveled for 4 hours. Therefore, the distance traveled by the Northern train is:

Distance Northern train = Speed Northern train * Time Northern train = 45 km/h * 4 hours = 180 km.

Now, let's calculate the distance traveled by the Southern train. We know that the total distance between the two stations is 15 km and the distance traveled by the Northern train is 180 km. Therefore, the distance traveled by the Southern train is:

Distance Southern train = Total distance - Distance Northern train = 15 km - 180 km = -165 km.

However, a negative distance doesn't make sense in this context. It seems there might be an error in the given information or calculations. Please double-check the values provided for the distance traveled by the Southern train (212 km) and the time it took for the Northern train to reach city S (4 hours).

If you have any further questions, please let me know!