Question

Машинист пассажирского поезда, двиговшегося со скоростью 56 км/час заметил, что товарный поезд двигавшийся со скоростью 34 км/час прошёл мимо него за 15 секунд. Какова длина поезда??? Помогите плиз!!!

Answer 1

Решение:
1) 56+34= 90 (км/ч)
2) 90000/360= 25 м/с
3) 25*15=375 (м)
Ответ: 375 м.

Answer 2

1) 56+34= 90 км/ч
2) 90 км/ч (90000/360) м/с =25 м/с
3) 25*15=375М

Answer 3

To find the length of the train, we can use the formula:

Length of train = (Relative speed × Time taken) / Speed of the passing train

In this case, the relative speed is the difference between the speeds of the passenger train and the freight train. The time taken is given as 15 seconds, and the speed of the freight train is 34 km/h.

Let's calculate the relative speed first:

Relative speed = Speed of passenger train - Speed of freight train = 56 km/h - 34 km/h = 22 km/h

Now, we can substitute the values into the formula to find the length of the train:

Length of train = (Relative speed × Time taken) / Speed of the passing train = (22 km/h × 15 seconds) / 34 km/h

To simplify the calculation, let's convert the time from seconds to hours:

15 seconds = 15/3600 hours (since there are 3600 seconds in an hour)

Substituting the values:

Length of train = (22 km/h × 15/3600 hours) / 34 km/h

Simplifying further:

Length of train = (22 × 15) / (34 × 3600) km

Calculating the result:

Length of train = 0.01875 km

Therefore, the length of the train is approximately 0.01875 km.

Please note that this calculation assumes that the entire length of the train passed by the passenger train within the given time frame.