Question

Из двух городов навстречу друг другу выехали два поезда. После того как первый поезд проехал 169 км, а второй - 140 км, расстояние между ними стало 50 км. Какое расстояние между городами?

Answer 1

169 + 140 + 50 = 359 км - между городами.

Answer 2

Problem Analysis

We have two trains traveling towards each other. After the first train has traveled 169 km and the second train has traveled 140 km, the distance between them is 50 km. We need to find the total distance between the two cities.

Solution

Let's assume the distance between the two cities is x km.

The first train has traveled 169 km, so the remaining distance for the first train to reach the second train is x - 169 km.

Similarly, the second train has traveled 140 km, so the remaining distance for the second train to reach the first train is x - 140 km.

When the two trains meet, the total distance traveled by both trains should be equal to the distance between the two cities.

So, we can set up the following equation:

(x - 169) + (x - 140) = x

Simplifying the equation:

2x - 309 = x

x = 309

Therefore, the total distance between the two cities is 309 km.

Answer

The total distance between the two cities is 309 km.