Question

На Первом участке пути автомобиль двигался 3 часа со скоростью 40 км в час а на втором 1 час со скоростью 60 км в час Какова средняя скорость автомобиля на всем пути

Answer 1

(3*40 + 1*60) / (3 + 1) = (120 + 60) / 4 = 180 / 4 = 45
Ответ: 45 км/ч

Answer 2

Calculation of Average Speed

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

On the first leg of the journey, the car traveled for 3 hours at a speed of 40 km/h. This means the distance covered on the first leg is 3 hours multiplied by 40 km/h, which equals 120 km.

On the second leg of the journey, the car traveled for 1 hour at a speed of 60 km/h. Therefore, the distance covered on the second leg is 1 hour multiplied by 60 km/h, which equals 60 km.

The total distance traveled is the sum of the distances covered on each leg: 120 km + 60 km = 180 km.

The total time taken is the sum of the time taken on each leg: 3 hours + 1 hour = 4 hours.

To find the average speed, we divide the total distance by the total time: 180 km / 4 hours = 45 km/h.

Therefore, the average speed of the car for the entire journey is 45 km/h.