Question

Два поезда выехали одновременно навстречу друг другу со станций,находящихся на расстоянии 660 км.Один поезд движется со скоростью 40 км/ч,другой-70км/ч.Через сколько часов поезда встретятся?На каком расстоянии от каждой из станций отправлений произойдет встреча?

Answer 1

скорость сближения

40+70=110км/ч

660км/110=6 часов -они встретятся

40км/ч*6ч=240км от станции

70км/ч*6=420км от станции

 

 

 

 

 

 

 

 

Answer 2

40+70=110км/ч- скорость сближения

660/110=6ч- через столько они встретятся

40*6=240 км- проедит 1 поезд до встречи

70*6=420 км- проедит до встречи второй поезд

Answer 3

Problem Analysis

We are given that two trains start simultaneously from two stations that are 660 km apart. The first train is traveling at a speed of 40 km/h, and the second train is traveling at a speed of 70 km/h. We need to determine how many hours it will take for the trains to meet and at what distance from each station the meeting will occur.

Solution

To solve this problem, we can use the formula: time = distance / speed.

Let's calculate the time it will take for the trains to meet:

1. The combined speed of the two trains is 40 km/h + 70 km/h = 110 km/h. 2. The time it will take for the trains to meet is the distance between the stations divided by the combined speed: 660 km / 110 km/h = 6 hours.

Therefore, the trains will meet after 6 hours.

To find the distance from each station where the meeting will occur, we can multiply the speed of each train by the time it takes for them to meet:

1. The distance from the first station is the speed of the first train multiplied by the time: 40 km/h * 6 hours = 240 km. 2. The distance from the second station is the speed of the second train multiplied by the time: 70 km/h * 6 hours = 420 km.

Therefore, the meeting will occur at a distance of 240 km from the first station and 420 km from the second station.

Answer

The trains will meet after 6 hours. The meeting will occur at a distance of 240 km from the first station and 420 km from the second station.