Question

Два поезда едут на встречу друг другу из двух городов.Первый поезд прошел до встречи 78 км,а второй -в 3 раза больше,чем первый.Чему равна длина пути между этими этими городами?На сколько километров меньше прошел до встречи первый поезд,чем второй?

Answer 1

78•3=234 км.
2) 78+234= 313 км.
3) 234- 78=156 км

Answer 2

1)78*3=234(км) - проехал второй поезд.
2)234+78=312(км) - длина пути между городами.
3)234-78=156(км) - на сколько больше проехал второй поезд.
Ответ: Длина пути между городами ровна 312 км., на 156 км. второй поезд проехал больше чем первый поезд.
Удачи в школе ;-) :-)

Answer 3

Problem Analysis

We are given two trains traveling towards each other from two different cities. The first train has traveled 78 km until they meet, while the second train has traveled three times the distance of the first train. We need to find the total distance between the two cities and the difference in distance traveled by the first and second trains.

Solution

Let's denote the distance traveled by the first train as x km. According to the problem, the second train has traveled three times the distance of the first train, so the distance traveled by the second train is 3x km.

To find the total distance between the two cities, we need to add the distances traveled by both trains. Therefore, the total distance is x + 3x = 4x km.

To find the difference in distance traveled by the first and second trains, we subtract the distance traveled by the first train from the distance traveled by the second train. Therefore, the difference is 3x - x = 2x km.

Calculation

Let's calculate the values of x, the total distance, and the difference in distance.

Given: Distance traveled by the first train = 78 km

Using the given information, we can set up the following equation: x + 3x = 78

Simplifying the equation: 4x = 78

Solving for x: x = 78 / 4 = 19.5

Therefore, the distance traveled by the first train is 19.5 km.

To find the total distance between the two cities, we multiply x by 4: Total distance = 4 * 19.5 = 78 km

Therefore, the total distance between the two cities is 78 km.

To find the difference in distance traveled by the first and second trains, we multiply x by 2: Difference = 2 * 19.5 = 39 km

Therefore, the difference in distance traveled by the first and second trains is 39 km.

Answer

The total distance between the two cities is 78 km. The first train has traveled 39 km less than the second train.