Question

Расстояние от посёлка Дубки до посёлка Красные Сосны автомобиль проехал за 3 ч, двигаясь со скоростью 80 км\ч. На обратную дорогу ему потребовалось в два раза больше времени. С какой скоростью ехал автомобиль на обратном пути? Сравни скорости движения автомобиля туда и обратно.

Answer 1

1)3*80=240(км)-расстояние от одного до другого посёлка
2)3*2=6(ч)-потребоволось  времени на обратную дорогу
3)240:6=40(км/ч)

Answer 2

Calculation of Speed and Time

To determine the speed of the car on the return journey and compare the speeds of the car going and returning, we can use the given information.

Let's denote the distance from the village of Dubki to the village of Krasnye Sosny as d.

According to the information provided, the car traveled from Dubki to Krasnye Sosny in 3 hours at a speed of 80 km/h. Therefore, the time taken to cover the distance d is 3 hours.

On the return journey, it took the car twice as long to cover the same distance. Therefore, the time taken to cover the distance d on the return journey is 6 hours.

Calculation of Speed on the Return Journey

To calculate the speed of the car on the return journey, we can use the formula:

Speed = Distance / Time

Since the distance d is the same for both the forward and return journeys, we can use the formula to calculate the speed on the return journey.

Speed on the return journey = Distance / Time on the return journey

Substituting the values, we get:

Speed on the return journey = d / 6

Comparison of Speeds

To compare the speeds of the car going and returning, we can calculate the ratio of the speeds.

Ratio of speeds = Speed on the return journey / Speed on the forward journey

Substituting the values, we get:

Ratio of speeds = (d / 6) / 80

Simplifying the expression, we get:

Ratio of speeds = d / (6 * 80)

Therefore, the ratio of speeds is d / (6 * 80).

Now, let's calculate the speed on the return journey and the ratio of speeds using the given information.

Calculation:

Given: - Time taken to cover the distance from Dubki to Krasnye Sosny = 3 hours - Time taken to cover the distance from Krasnye Sosny to Dubki = 6 hours - Speed on the forward journey = 80 km/h

Using the formula for speed, we can calculate the speed on the return journey:

Speed on the return journey = Distance / Time on the return journey

Since the distance is the same for both journeys, we can calculate the ratio of speeds:

Ratio of speeds = Speed on the return journey / Speed on the forward journey

Let's substitute the values and calculate:

Speed on the return journey = d / 6

Ratio of speeds = (d / 6) / 80

Therefore, the speed on the return journey is d / 6 and the ratio of speeds is (d / 6) / 80.

Please note that the exact value of the distance between Dubki and Krasnye Sosny is not provided in the question. Without this information, we cannot calculate the exact speed on the return journey or the ratio of speeds.