Question

Расстояние между двумя городами равно 375 км. Из этих городов навстречу друг другу одновременно выехали автомобиль и автобус. Они встретились чрез 2.5 часа . Опеделите скорость автомобиля, если известно, что она больше скорости автобуса на 20.км.ч. Решите без x И С ПОЯСНЕНИЕМ ПЖ (30 б)

Answer 1

Незнаю насчёт правельности:

Answer 2

375:5=75(км.)
75*2=150(км.ч)
Ответ:150км.ч скорость автомобиля.
Удачи!

Answer 3

Problem Analysis

We are given that the distance between two cities is 375 km. An automobile and a bus start from these cities simultaneously and meet after 2.5 hours. We also know that the speed of the automobile is 20 km/h faster than the speed of the bus. We need to determine the speed of the automobile.

Solution

Let's assume the speed of the bus is x km/h. Since the speed of the automobile is 20 km/h faster, its speed will be x + 20 km/h.

We can use the formula speed = distance / time to calculate the speeds of the automobile and the bus.

The time taken by both the automobile and the bus to meet is 2.5 hours. The total distance covered by both vehicles is equal to the distance between the cities, which is 375 km.

Using the formula, we can set up the following equation:

375 = (x + x + 20) * 2.5

Now, let's solve this equation to find the value of x.

Calculation

To solve the equation, we can simplify it as follows:

375 = (2x + 20) * 2.5

Expanding the equation:

375 = 5x + 50

Rearranging the equation:

5x = 375 - 50

5x = 325

Dividing both sides of the equation by 5:

x = 65

Answer

The speed of the bus is 65 km/h. Since the speed of the automobile is 20 km/h faster, the speed of the automobile is 65 + 20 = 85 km/h.

Therefore, the speed of the automobile is 85 km/h.