Question

Товарный и пассажирский поезда движутся в противоположных направлениях удаляясь друг от друга.Скорость товарного поеза45км\ч,а скорость пассажирского на 23 км\ч больше.Сейчас между ними 10 км.Какое между ними будет раасстояние через 3,5часов Помогите решить)

Answer 1

45+23=68км/час скорость пассажирского
45+68=113км/час скорость удаления
113*3,5=395,5км проедут за 3,5 часа
395,5+10=405,5км расстояние между ними через 3,5 часа

Answer 2

Problem Analysis

We have a situation where a freight train and a passenger train are moving in opposite directions, with the freight train traveling at a speed of 45 km/h and the passenger train traveling at a speed 23 km/h faster than the freight train. The initial distance between them is 10 km, and we need to determine the distance between them after 3.5 hours.

Solution

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

Let's calculate the distance traveled by each train after 3.5 hours.

The freight train's speed is 45 km/h, so the distance it will travel in 3.5 hours is: distance_f = speed_f × time = 45 km/h × 3.5 h.

The passenger train's speed is 23 km/h faster than the freight train, so its speed is 45 km/h + 23 km/h = 68 km/h. The distance it will travel in 3.5 hours is: distance_p = speed_p × time = 68 km/h × 3.5 h.

To find the final distance between the two trains, we need to subtract the initial distance of 10 km from the sum of the distances traveled by each train: final_distance = (distance_f + distance_p) - initial_distance.

Let's calculate the final distance between the two trains.

Calculation

Using the given values: - Speed of the freight train (speed_f) = 45 km/h - Speed of the passenger train (speed_p) = 45 km/h + 23 km/h = 68 km/h - Time (time) = 3.5 hours - Initial distance (initial_distance) = 10 km

Calculating the distances traveled by each train: - distance_f = 45 km/h × 3.5 h = 157.5 km - distance_p = 68 km/h × 3.5 h = 238 km

Calculating the final distance between the two trains: - final_distance = (157.5 km + 238 km) - 10 km = 385.5 km

Answer

Therefore, the distance between the freight train and the passenger train after 3.5 hours will be 385.5 km.

Please let me know if you need any further assistance!