Question

Два электропоезда отправились от двух станций навстречу друг другу. Через 3 мин расстояние между ними стало 7 км. Найдите расстояние между станциями, если скорость первого электропоезда 60 км/ч, а скорость второго — 80 км/ч?

Answer 1

Оба поезда ехали 3 минуты, значит 0,05*60=3 км (проехал первый поезд за 3 минуты) 0,05*80=4 км (проехал второй поезд за 3 минуты). Применяем формулу S=V×t. Таким образом мы посчитали сколько км проехали оба поезда за 3 минуты,а именно 3+4=7 км. И прибавляем отставшееся расстояние 7+7=14 км. (0.05 это отношение минут к часам)

Answer 2

60 км/ч + 80 км/ч = 140 км/ч

Answer 3

Problem Analysis

We are given that two trains start from two different stations and are heading towards each other. After 3 minutes, the distance between them is 7 km. We are also given the speeds of the two trains: the first train is traveling at 60 km/h, and the second train is traveling at 80 km/h. We need to find the distance between the two stations.

Solution

Let's assume that the distance between the two stations is x km.

We can calculate the distance covered by the first train in 3 minutes (0.05 hours) using the formula: distance = speed × time. The speed of the first train is 60 km/h, and the time is 0.05 hours. Therefore, the distance covered by the first train is 60 × 0.05 = 3 km.

Similarly, we can calculate the distance covered by the second train in 3 minutes (0.05 hours). The speed of the second train is 80 km/h, and the time is 0.05 hours. Therefore, the distance covered by the second train is 80 × 0.05 = 4 km.

After 3 minutes, the total distance covered by both trains is 3 km + 4 km = 7 km, as given in the problem.

Now, we can set up an equation to solve for the distance between the two stations:

x = distance covered by the first train + distance covered by the second train

x = 3 km + 4 km

x = 7 km

Therefore, the distance between the two stations is 7 km.

Answer

The distance between the two stations is 7 km.