Question

Автомобиль проехал 1 половину пути со скоростью 60 км в час оставшийся часть пути он половину времени ехал со скоростью 35 км в час а последний участок 45 км в час.Найти всю среднюю скорость автомобиля?

Answer 1

60+35+45:3=48км/ч...............

Answer 2

Calculation of Average Speed

To find the average speed of the car, we need to calculate the total distance traveled and the total time taken.

Let's break down the given information:

- The car traveled half of the distance at a speed of 60 km/h. - The remaining half of the distance was covered in half the time, with speeds of 35 km/h and 45 km/h.

To calculate the average speed, we can use the formula:

Average Speed = Total Distance / Total Time

Let's calculate the total distance and total time step by step.

1. Distance traveled at 60 km/h: - Since the car traveled half of the distance at this speed, we can assume the total distance as 2x, where x is the distance covered at 60 km/h. - Therefore, the distance covered at 60 km/h is x km.

2. Distance traveled at 35 km/h: - The remaining half of the distance was covered in half the time, so the distance covered at 35 km/h is also x km.

3. Distance traveled at 45 km/h: - The remaining half of the distance was covered in half the time, so the distance covered at 45 km/h is also x km.

4. Total distance: - The total distance is the sum of the distances covered at different speeds. - Total distance = x + x + x = 3x km.

5. Time taken at 60 km/h: - Time = Distance / Speed - Time taken at 60 km/h = x km / 60 km/h = x/60 hours.

6. Time taken at 35 km/h: - Time taken at 35 km/h = x km / 35 km/h = x/35 hours.

7. Time taken at 45 km/h: - Time taken at 45 km/h = x km / 45 km/h = x/45 hours.

8. Total time: - The total time is the sum of the times taken at different speeds. - Total time = x/60 + x/35 + x/45 hours.

Now, we can calculate the average speed using the formula mentioned earlier:

Average Speed = Total Distance / Total Time

Substituting the values:

Average Speed = (3x km) / (x/60 + x/35 + x/45) hours

Simplifying the expression:

Average Speed = (3x km) / [(x * (1/60 + 1/35 + 1/45))] hours

To find the value of x, we need additional information or constraints from the problem statement. Without that, we cannot determine the exact value of the average speed.

Please provide any additional information or constraints if available, so we can calculate the average speed accurately.