Question

5. Из двух городов отправились одновременно навстречу друг другу два поезда со скоростями 48км\ч и 54км\ч .Найти расстояние между городами если поезда встретились через 4ч после начала движения.

Answer 1

Это первый вариант решения!!!!!1)48+54=102(км/ч)-скорость сближения за 1 час. 2)102*4=408(км)-расстояние между городами. Это второй вариант решения!!!!!!!!1)48*4=192(км)-расстояние первого поезда.2)54*4=216(км)-расстояние второго поезда.3)192+216=408(км)-расстояние межде городами

Answer 2

48*4+54*4=182+216=398

Answer 3

Problem Analysis

We are given that two trains start simultaneously from two cities and travel towards each other. The speeds of the trains are 48 km/h and 54 km/h. We need to find the distance between the cities if the trains meet after 4 hours.

Solution

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

Let's assume that the distance between the two cities is d km.

The first train travels at a speed of 48 km/h for 4 hours, so the distance it covers is 48 * 4 = 192 km.

The second train travels at a speed of 54 km/h for 4 hours, so the distance it covers is 54 * 4 = 216 km.

Since the two trains are traveling towards each other, the sum of the distances covered by both trains should be equal to the total distance between the cities.

Therefore, we can write the equation: 192 + 216 = d.

Simplifying the equation, we find that the distance between the cities is 408 km.

Answer

The distance between the two cities is 408 km.

Explanation

When the two trains start simultaneously and travel towards each other, the distance between the cities can be found by adding the distances covered by both trains. In this case, the first train covers a distance of 192 km in 4 hours, and the second train covers a distance of 216 km in 4 hours. Adding these distances gives us a total distance of 408 km between the cities.