Question

Срочно!!! Первые два часа автомобиль ехал со скоростью 110 км/ч, следующие два часа - со скоростью 80 км/ч, а затем три часа - со скоростью 60 км/ч. Найдите среднюю скорость автомобиля на протяжении всего пути.

Answer 1

Calculation of Average Speed

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

Given the following information: - The car traveled at a speed of 110 km/h for the first two hours. - The car then traveled at a speed of 80 km/h for the next two hours. - Finally, the car traveled at a speed of 60 km/h for the last three hours.

To calculate the total distance traveled, we sum up the distances covered at each speed: - Distance covered at 110 km/h: 110 km/h * 2 hours = 220 km - Distance covered at 80 km/h: 80 km/h * 2 hours = 160 km - Distance covered at 60 km/h: 60 km/h * 3 hours = 180 km

The total distance traveled is the sum of these distances: 220 km + 160 km + 180 km = 560 km.

To calculate the total time taken, we sum up the times taken at each speed: - Time taken at 110 km/h: 2 hours - Time taken at 80 km/h: 2 hours - Time taken at 60 km/h: 3 hours

The total time taken is the sum of these times: 2 hours + 2 hours + 3 hours = 7 hours.

Now, we can calculate the average speed by dividing the total distance traveled by the total time taken: Average speed = Total distance / Total time = 560 km / 7 hours = 80 km/h.

Therefore, the average speed of the car over the entire journey is 80 km/h.

Please note that the sources provided do not contain specific information related to this calculation.