Question

Из двух пунктов одновременно выехали навстречу друг другу две машины, которые встретились через 30 минут. с какой скоростью двигалась каждая машина если первая проехала до встречи 30 км, а вторая 40 км?

Answer 1

1. 30×2=60 (км/ч)-скорость 1 машины
2. 40×2=80(км/ч)-скорость 2 машины
Ответ: 60км/ч,80км/ч

Answer 2

Problem Analysis

We have two cars that start from different points and meet each other after 30 minutes. The first car travels 30 km before the meeting, while the second car travels 40 km. We need to determine the speed of each car.

Solution

Let's assume the speed of the first car is x km/h and the speed of the second car is y km/h.

To find the speeds of the cars, we can use the formula: speed = distance / time.

For the first car: - Distance = 30 km - Time = 30 minutes = 0.5 hours

Using the formula, we can calculate the speed of the first car as 30 km / 0.5 hours = 60 km/h.

For the second car: - Distance = 40 km - Time = 30 minutes = 0.5 hours

Using the formula, we can calculate the speed of the second car as 40 km / 0.5 hours = 80 km/h.

Therefore, the first car was moving at a speed of 60 km/h and the second car was moving at a speed of 80 km/h.

Answer

The first car was moving at a speed of 60 km/h and the second car was moving at a speed of 80 km/h.