Question

Из двух городов навстречу друг другу выехали два автомобиля.Скорость первого автомобиля- на 10 км/час больше.Какое расстояние между городами, если через 3 часа расстояние между автомобилями составляло 435 км?

Answer 1

) 65*4 = 260 (км) — расстояние, которое проехала 1 машина.2) 540-260 = 280 (км) — расстояние, которое проехала 2 машина.3) 280:4 = 70 (км/ч)Ответ: 70 км/ч — скорость второй машины.

Answer 2

Problem Analysis

We have two cars traveling towards each other from two different cities. The speed of the first car is 10 km/h faster than the speed of the second car. After 3 hours, the distance between the two cars is 435 km. We need to find the distance between the two cities.

Solution

Let's assume the speed of the second car is x km/h. Therefore, the speed of the first car is x + 10 km/h.

We know that distance = speed × time.

After 3 hours, the distance traveled by the first car is (x + 10) × 3 km, and the distance traveled by the second car is x × 3 km.

The sum of these distances is equal to the total distance between the two cities, which is 435 km.

So, we can write the equation:

(x + 10) × 3 + x × 3 = 435

Simplifying the equation:

3x + 30 + 3x = 435

6x + 30 = 435

6x = 435 - 30

6x = 405

x = 405 / 6

x = 67.5

Therefore, the speed of the second car is 67.5 km/h, and the speed of the first car is 67.5 + 10 = 77.5 km/h.

Now, we