Question

Вiдстань між двома пунктами автомобіль проїхав зі швидкіс-тю 60 км/год. Назад він повертався зі швидкістю 15 м/с. Яка (3 бали) середня швидкість рейсу з одного пункту в другий і назад?

Answer 1

To find the average speed of a round trip, we can use the formula:

Average Speed = Total Distance / Total Time

In this case, we need to find the total distance traveled and the total time taken for the round trip.

Finding the Total Distance:

The total distance traveled is the sum of the distances traveled from one point to another and back. Since the distance is the same in both directions, we can simply double the distance between the two points.

Finding the Total Time:

To find the total time taken, we need to calculate the time taken for each leg of the trip separately and then add them together.

For the first leg of the trip, the car traveled at a speed of 60 km/h. To find the time taken, we can use the formula:

Time = Distance / Speed

For the second leg of the trip, the car traveled at a speed of 15 m/s. However, we need to convert this speed to km/h to ensure consistent units. Since 1 m/s is equal to 3.6 km/h, we can convert the speed as follows:

15 m/s * 3.6 km/h = 54 km/h

Now, we can use the formula mentioned above to find the time taken for the second leg of the trip.

Calculating the Average Speed:

Once we have the total distance and the total time, we can calculate the average speed using the formula mentioned earlier.

Let's calculate the average speed step by step:

1. Find the total distance: - The distance between the two points is not given in the question, so we cannot calculate the total distance.

Unfortunately, without the distance between the two points, we cannot calculate the average speed. Please provide the distance between the two points, and I will be happy to help you calculate the average speed.