Question

Я еду в поезде со скоростью 60км.ч и вижу, как в течение 3 секунд мимо моего окна в противоположном направлении проходит поезд, имеющий длину 120м. С какой скоростью шел встречный поезд?

Answer 1

120м=0,12км

1час=3600с

 

3с - 0,12км

3600с - ?км

 

3600 * 0,12:3=144(км/ч) - скорость сближения поездов.

144 - 60=84(км/ч) -скорость встречного поезда.

Answer 2

Calculation of the Speed of the Oncoming Train

To calculate the speed of the oncoming train, we can use the information provided:

- The observer is traveling in a train with a speed of 60 km/h. - The observer sees a train passing by in the opposite direction for a duration of 3 seconds. - The length of the passing train is 120 meters.

To find the speed of the oncoming train, we can use the formula:

Speed = Distance / Time

First, let's convert the speed of the observer's train from km/h to m/s:

60 km/h = (60 * 1000) / 3600 = 16.67 m/s.

Next, we need to find the distance traveled by the passing train. Since the observer sees the train for 3 seconds and the length of the passing train is 120 meters, the distance traveled by the passing train is:

Distance = Length of the passing train = 120 meters.

Now, we can calculate the speed of the oncoming train:

Speed of the oncoming train = Distance / Time = 120 meters / 3 seconds = 40 m/s.

Therefore, the speed of the oncoming train is 40 m/s.

Please note that the speed of the oncoming train is calculated based on the information provided and may not represent the actual speed of the train.