Question

Первая машина выехала в 9 утра со скоростью 60 км/ я, вторая выехала следом в 11 часов со скоростью 90 км/ч. Через какое время вторая машина догонит первую? Решите пожалуйста

Answer 1

(90-60)*(11-9):30=2км/ч

Answer 2

Problem Analysis

We are given two cars. The first car starts at 9 AM with a speed of 60 km/h, and the second car starts at 11 AM with a speed of 90 km/h. We need to determine how long it will take for the second car to catch up to the first car.

Solution

To solve this problem, we can use the concept of relative speed. The relative speed between the two cars is the difference in their speeds. In this case, the relative speed is 90 km/h - 60 km/h = 30 km/h.

Let's assume that the second car catches up to the first car after time 't' hours. During this time, the first car would have traveled a distance of 60 km/h * t hours, and the second car would have traveled a distance of 90 km/h * t hours.

Since the second car catches up to the first car, the distance traveled by both cars must be the same. Therefore, we can set up the following equation:

60 km/h * t = 90 km/h * t

Simplifying the equation, we get:

30 km/h * t = 0

Since the relative speed is 30 km/h, the second car will never catch up to the first car. This means that the second car will not be able to catch up to the first car.

Answer

The second car will not be able to catch up to the first car.