Question

Из двух городов,расстояние между которыми 900 км,одновременно навстречу друг другу вышли два поезда.Скорость первого поезда 45 км/ч, а второго 55 км/ч. Через сколько часов поезда встретятся

Answer 1

500 ÷5 = 100 км ч общая скорость об п
100 -45=55 км ч скорость 2 п

Answer 2

Найти скорость сближения поездов?
55 км/час+45км/час=100км/час
Через сколько поезда встретятся?
900км:100км/час=9 час.
Ответ: через 9ч часов поезда встретятся.

Answer 3

Problem Analysis

We have two trains traveling towards each other on a straight track. The distance between the two cities is 900 km. The first train is traveling at a speed of 45 km/h, and the second train is traveling at a speed of 55 km/h. We need to find out how many hours it will take for the trains to meet.

Solution

To solve this problem, we can use the formula:

Time = Distance / Relative Speed

The relative speed of the two trains is the sum of their individual speeds. Let's calculate the time it will take for the trains to meet.

Calculation

The relative speed of the two trains is 45 km/h + 55 km/h = 100 km/h.

Using the formula, we can calculate the time it will take for the trains to meet:

Time = 900 km / 100 km/h = 9 hours

Therefore, the trains will meet after 9 hours.

Answer

The two trains will meet after 9 hours.