Question

Поезд ехал 3 часа со скоростью 65,2 км/ч и 2 часа со скоростью 83,3 км/ч.Найдите среднюю скорость поезда за эти 5 часов.

Answer 1

1)65,2*3=195,6 (км) - первый участок пути

2) 83,3*2=166,6 (км) - второй участок пути

3) (195,6+166,6):5=72,44 (км/ч) - средняя скорость поезда

Answer 2

(65,2 х 3) + (83,2 х 2) = 362 км. ------- прошел поезд за 5 часов. 
362 км : 5 часов = 72,4 км/час -------средняя скорость  поезда .

Answer 3

Calculating the Average Speed of the Train

To find the average speed of the train for the 5-hour journey, we can use the formula:

Average Speed = Total Distance / Total Time

First, let's calculate the total distance traveled by the train.

The train traveled at a speed of 65.2 km/h for 3 hours and at a speed of 83.3 km/h for 2 hours.

The total distance traveled can be calculated as: ``` Total Distance = (Speed1 * Time1) + (Speed2 * Time2) ``` Where: - Speed1 = 65.2 km/h - Time1 = 3 hours - Speed2 = 83.3 km/h - Time2 = 2 hours

Now, let's calculate the total distance using the given speeds and times.

Total Distance = (65.2 km/h * 3 hours) + (83.3 km/h * 2 hours)

Total Distance = (195.6 km) + (166.6 km)

Total Distance = 362.2 km

Now that we have the total distance, we can calculate the average speed using the formula mentioned earlier.

Average Speed = Total Distance / Total Time

Total Time = 3 hours + 2 hours = 5 hours

Average Speed = 362.2 km / 5 hours

Average Speed = 72.44 km/h

Therefore, the average speed of the train for the 5-hour journey is 72.44 km/h.