Question

Автомобіль рухався першу половину часу зі швидкістю 60 км год а другу зі швидкістю 40 км год Визначте середню швидкість руху автомобіля на всьому шляху

Answer 1

Ответ:

13,3 м/с = 48 км/ч

Объяснение:

Answer 2

Calculation of Average Speed

To calculate the average speed of a car, we need to consider the total distance traveled and the total time taken. In this case, the car traveled for two different durations at different speeds.

Let's assume that the car traveled for a total time of t hours. The car traveled at a speed of 60 km/h for the first half of the time and at a speed of 40 km/h for the second half of the time.

The total distance traveled by the car can be calculated by adding the distances traveled at each speed. Since the car traveled at a constant speed, we can use the formula:

Distance = Speed × Time

For the first half of the time, the car traveled at a speed of 60 km/h. Therefore, the distance traveled in the first half of the time is:

Distance1 = Speed1 × Time1

For the second half of the time, the car traveled at a speed of 40 km/h. Therefore, the distance traveled in the second half of the time is:

Distance2 = Speed2 × Time2

The total distance traveled by the car is the sum of the distances traveled in the first and second halves of the time:

Total Distance = Distance1 + Distance2

The average speed of the car can be calculated by dividing the total distance traveled by the total time taken:

Average Speed = Total Distance / Total Time

Let's calculate the average speed using the given information.

Calculation Steps

1. Calculate the time taken for each half of the journey: - The car traveled for a total time of t hours. - The first half of the journey took t/2 hours. - The second half of the journey also took t/2 hours.

2. Calculate the distance traveled in each half of the journey: - The car traveled at a speed of 60 km/h for the first half of the time. - Therefore, the distance traveled in the first half of the time is 60 × (t/2) km. - The car traveled at a speed of 40 km/h for the second half of the time. - Therefore, the distance traveled in the second half of the time is 40 × (t/2) km.

3. Calculate the total distance traveled by the car: - The total distance traveled is the sum of the distances traveled in the first and second halves of the time. - Therefore, the total distance traveled is 60 × (t/2) + 40 × (t/2) km.

4. Calculate the average speed of the car: - The average speed is the total distance traveled divided by the total time taken. - Therefore, the average speed is (60 × (t/2) + 40 × (t/2)) / t km/h.

Let's calculate the average speed using the given information.

Calculation

Given that the car traveled for the entire time, we can assume that the total time taken is t = 1 hour.

1. Calculate the time taken for each half of the journey: - The first half of the journey took t/2 = 1/2 hour. - The second half of the journey also took t/2 = 1/2 hour.

2. Calculate the distance traveled in each half of the journey: - The distance traveled in the first half of the time is 60 × (t/2) = 60 × (1/2) = 30 km. - The distance traveled in the second half of the time is 40 × (t/2) = 40 × (1/2) = 20 km.

3. Calculate the total distance traveled by the car: - The total distance traveled is the sum of the distances traveled in the first and second halves of the time. - Therefore, the total distance traveled is 30 km + 20 km = 50 km.

4. Calculate the average speed of the car: - The average speed is the total distance traveled divided by the total time taken. - Therefore, the average speed is (30 km + 20 km) / 1 hour = 50 km/h.

Therefore, the average speed of the car for the entire journey is 50 km/h.

Please note that the calculations above are based on the assumption that the car traveled for a total time of 1 hour. If the actual time taken is different, the average speed will vary accordingly.