Question

Из городов A и B, расстояние между которыми равно 330 км, навстречу друг другу одновременно выехали два автомобиля и встретились через 3 часа на расстоянии 180 км от города B. Найдите скорость автомобиля, выехавшего из города A. Ответ дайте в км/ч.

Answer 1

сначало находим сколько проехал автомобиль а... 330-180=150 км... затем находим скорость... 150/3=50км/ч. 

Answer 2

Problem Analysis

We are given that two cars, one starting from city A and the other from city B, simultaneously travel towards each other. They meet after 3 hours at a distance of 180 km from city B. We need to find the speed of the car that started from city A.

Solution

Let's assume the speed of the car that started from city A is x km/h. Since the two cars are traveling towards each other, the combined speed of the two cars is the sum of their individual speeds.

The distance traveled by the car that started from city A in 3 hours is 3x km. The distance traveled by the car that started from city B in 3 hours is (330 - 3x) km.

When they meet, the total distance traveled by both cars is equal to the distance between the two cities, which is 330 km. Therefore, we can write the equation:

3x + (330 - 3x) = 330

Simplifying the equation:

3x + 330 - 3x = 330

330 = 330

This equation is true for any value of x. Therefore, the speed of the car that started from city A can be any value.

Hence, the speed of the car that started from city A is x km/h.

Please note that the given problem does not provide enough information to determine the specific speed of the car that started from city A.