Question

Два поезда вышли из двух городов одновременно навстречу друг другу и встретились через 4 часа.Скорость 1 поезда 68 км/час,второго 72км/час.Чему равно расстояние между городами

Answer 1

68*4=272(км)-прошёл первый поезд
72*4=288(км)-прошёл второй поезд
288+272=560(км)-расстояние между городами

Answer 2

Problem Analysis

We are given that two trains start from two cities simultaneously and meet each other after 4 hours. The speed of the first train is 68 km/h, and the speed of the second train is 72 km/h. We need to find the distance between the two cities.

Solution

To find the distance between the two cities, we can use the formula:

Distance = Speed × Time

Let's calculate the distance using this formula.

The speed of the first train is 68 km/h, and the time taken to meet the second train is 4 hours. Therefore, the distance covered by the first train is:

Distance of the first train = Speed of the first train × Time = 68 km/h × 4 hours

Similarly, the speed of the second train is 72 km/h, and the time taken to meet the first train is 4 hours. Therefore, the distance covered by the second train is:

Distance of the second train = Speed of the second train × Time = 72 km/h × 4 hours

Since the two trains are traveling towards each other, the sum of the distances covered by both trains will give us the total distance between the two cities:

Total distance = Distance of the first train + Distance of the second train

Let's calculate the total distance using the given values.

Calculation

Distance of the first train = 68 km/h × 4 hours = 272 km.

Distance of the second train = 72 km/h × 4 hours = 288 km.

Total distance = 272 km + 288 km = 560 km.

Answer

The distance between the two cities is 560 km.