Question

Решите задачу и запишите числовое выражение её решения : Расстояние между городами 300км. Автомобиль проехал первуюполовину пути со скоростью 50км/ч, а вторую – со скоростью 75 км/ч.Сколько времени автомобиль затратит на весь путь? дайте решние плиз

Answer 1

Пошаговое объяснение:

300:50=6часов(1)

300:75=4 часа(2)

ответ: 10 часов

Answer 2

Problem Analysis

To find the time it takes for the car to travel the entire distance, we need to calculate the time it takes for the car to travel the first half of the distance and the time it takes for the car to travel the second half of the distance. We can then add these two times together to get the total time.

Solution

Let's start by calculating the time it takes for the car to travel the first half of the distance.

The distance between the cities is 300 km. The car travels the first half of the distance at a speed of 50 km/h. To find the time it takes for the car to travel the first half, we can use the formula:

Time = Distance / Speed

Substituting the values, we get:

Time for first half = 150 km / 50 km/h = 3 hours

Now, let's calculate the time it takes for the car to travel the second half of the distance.

The car travels the second half of the distance at a speed of 75 km/h. Using the same formula as before, we can calculate the time:

Time for second half = 150 km / 75 km/h = 2 hours

Finally, we can find the total time it takes for the car to travel the entire distance by adding the times for the first and second halves:

Total time = Time for first half + Time for second half = 3 hours + 2 hours = 5 hours

Therefore, the car will take 5 hours to travel the entire distance.

Answer

The car will take 5 hours to travel the entire distance.

Verification

Let's verify the solution using the given information.

The car travels the first half of the distance (150 km) at a speed of 50 km/h. This means it will take 3 hours to cover this distance.

The car then travels the second half of the distance (150 km) at a speed of 75 km/h. This means it will take 2 hours to cover this distance.

Adding the times for the first and second halves, we get a total time of 5 hours.

Therefore, the solution is verified.