Question

Расстояние между городами M и N равно 660 км. Из города M со скоростью 75 км ч вышел поезд , через 2 часа навстречу ему из города N вышел другой поезд со скоростью 95 км ч . Через сколько часо с момента выхода поезда из города M ? они встретятся?

Answer 1

Все что зачеркнуто не надо 

Answer 2

Problem Analysis

To solve this problem, we need to find the time it takes for two trains, one traveling from city M at 75 km/h and the other from city N at 95 km/h, to meet if the distance between the cities is 660 km.

Solution

Let's denote the time it takes for the trains to meet as t hours. The total distance traveled by the first train is then 75t km, and the total distance traveled by the second train is 95t km. Since they are traveling towards each other, the sum of these distances should equal the total distance between the cities, which is 660 km.

Calculations

We can set up the equation: 75t + 95t = 660 Solving for t will give us the time it takes for the trains to meet.

Result

Let's solve for t using the given equation: 75t + 95t = 660 170t = 660 t = 660 / 170 t ≈ 3.88 hours

Answer

The trains will meet approximately 3.88 hours after the first train leaves city M.