Question

И из двух городов выехали две машины скорость первого авто 120 км в час второго на два раза меньше через сколько часов они встретятся если расстояние между городами 540 км

Answer 1

1) 120 : 2 = 60 (км/ч) - скорость 2 авто
2) 120 + 60 = 180 (км/ч) - скорость 1 и 2 авто
3) 540 : 180 = 3 (ч)
Ответ: 3 часа

Answer 2

Problem Analysis

We are given that two cars start from two different cities and are traveling towards each other. The speed of the first car is 120 km/h, while the speed of the second car is half that of the first car. We need to determine how many hours it will take for the two cars to meet if the distance between the cities is 540 km.

Solution

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

Let's calculate the time it will take for each car to reach the meeting point.

The distance between the cities is 540 km.

The speed of the first car is 120 km/h, so the time it will take for the first car to reach the meeting point is: time1 = distance / speed1 = 540 km / 120 km/h.

The speed of the second car is half that of the first car, so the speed of the second car is 120 km/h / 2 = 60 km/h. Therefore, the time it will take for the second car to reach the meeting point is: time2 = distance / speed2 = 540 km / 60 km/h.

To find the total time it will take for the two cars to meet, we can add the times for each car: total time = time1 + time2.

Let's calculate the total time.

Calculation

Using the given values: - Distance between the cities: 540 km - Speed of the first car: 120 km/h - Speed of the second car: 60 km/h

We can calculate the time it will take for each car to reach the meeting point: - time1 = 540 km / 120 km/h - time2 = 540 km / 60 km/h

Now, let's calculate the total time: - total time = time1 + time2

Answer

The two cars will meet after total time hours.

Let's calculate the values.

Calculation

- time1 = 540 km / 120 km/h = 4.5 hours - time2 = 540 km / 60 km/h = 9 hours

Now, let's calculate the total time: - total time = time1 + time2 = 4.5 hours + 9 hours = 13.5 hours

Therefore, the two cars will meet after 13.5 hours.

Summary

The two cars will meet after 13.5 hours if the distance between the cities is 540 km. The first car has a speed of 120 km/h, while the second car has a speed of 60 km/h.