Question

От вокзала одновременно одном направлении отправились два поезда: один со скоростью78км/ч,а другой-82 км/ч. На каком расстоянии друг от друга будут поезда через 3 ч?

Answer 1

1) 78 * 3 = -пройдет 1 поезд за 3 часа

2) 82 * 3 = - пройдет 2 поезд за 3 часа

3) 1) - 2) = ответ

Answer 2

1) 78*3=234 (км) - будет 1 поезд через 3 часа.
2) 82*3=246 (км) - будет 2 поезд через 3 часа.
3) 246-234=12 (км) - будет расстояние между ними через 3 часа.
Ответ: 12 км.

Answer 3

Problem Analysis

We are given two trains that depart from the same train station simultaneously in the same direction. The first train has a speed of 78 km/h, and the second train has a speed of 82 km/h. We need to determine the distance between the two trains after 3 hours.

Solution

To find the distance between the two trains after 3 hours, we can use the formula:

Distance = Speed × Time

Let's calculate the distance traveled by each train after 3 hours and then find the difference between the two distances.

1. Distance traveled by the first train: - Speed of the first train = 78 km/h - Time = 3 hours - Distance = 78 km/h × 3 hours = 234 km

2. Distance traveled by the second train: - Speed of the second train = 82 km/h - Time = 3 hours - Distance = 82 km/h × 3 hours = 246 km

3. Difference in distance between the two trains: - Distance of the first train - Distance of the second train = 234 km - 246 km = -12 km

The negative sign indicates that the first train is 12 km behind the second train after 3 hours.

Therefore, the two trains will be 12 km apart from each other after 3 hours.

Answer

The two trains will be 12 km apart from each other after 3 hours.