Question

Из двух городов,расстояние между которыми 540км,одновременно наастречу друг другу выехали два автомобиля.Через 4 ч автомобили встретились.Скорость одного автомобиля -70км/ч .С какой скоростью ехал другой автомобиль?

Answer 1

Бензин кончился. (реально) ничего решать не надо. Лан лан вот:4*70 + 4*x = 540

Answer 2

Problem Analysis

We are given that two cars start from two different cities and travel towards each other. The distance between the cities is 540 km. After 4 hours, the cars meet. We are also given the speed of one car, which is 70 km/h. We need to find the speed of the other car.

Solution

Let's assume the speed of the second car is x km/h. Since both cars are traveling towards each other, their combined speed is the sum of their individual speeds. Therefore, the combined speed of the two cars is 70 km/h + x km/h.

We can use the formula distance = speed × time to find the distance traveled by each car. The distance traveled by the first car is 70 km/h × 4 h = 280 km. The distance traveled by the second car is x km/h × 4 h.

Since the total distance between the two cities is 540 km, the sum of the distances traveled by the two cars should be equal to 540 km. Therefore, we can write the equation:

280 km + (x km/h × 4 h) = 540 km

Simplifying the equation, we have:

280 km + 4x km = 540 km

Subtracting 280 km from both sides of the equation, we get:

4x km = 260 km

Dividing both sides of the equation by 4, we find:

x km = 65 km/h

Therefore, the speed of the second car is 65 km/h.

Answer

The second car was traveling at a speed of 65 km/h.