Question

В 15 ч 30мин из двух городов одновременно вышли навстречу друг другу два поезда.Поезда встретились в 19ч30мин.Скорость первого поезда 90км/ч,а второго -70км/ч.Какое расстояние между городами?

Answer 1

Решение :90+70=160*4=640. Ответ :640 Км.

Answer 2

Problem Analysis

We have two trains that start from two different cities at the same time and travel towards each other. The first train has a speed of 90 km/h, and the second train has a speed of 70 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 time it took for the trains to meet. The first train traveled for 4 hours (from 15:30 to 19:30), and the second train also traveled for 4 hours.

Now, let's calculate the distance traveled by each train:

Distance of the first train = Speed of the first train * Time = 90 km/h * 4 hours = 360 km

Distance of the second train = Speed of the second train * Time = 70 km/h * 4 hours = 280 km

Since the trains are traveling towards each other, the total distance between the two cities is the sum of the distances traveled by each train:

Total distance = Distance of the first train + Distance of the second train = 360 km + 280 km = 640 km

Therefore, the distance between the two cities is 640 km.

Answer

The distance between the two cities is 640 km.