Question

На переезд из одного города в другой потребовалось 3 дня. В первый день он проехал 825 км за 8 часов, во второй 225 км за 6 часов, а в третий он проехал остальной путь за 6 часов, передвигаясь со скоростью 70 км/ч. Сколько километров в час была средняя скорость движения автомобиля?

Answer 1

70*6=420 км проехал автомобиль за третий день
825+225+420=1470 км - проехал автомобиль за 3 дня
8+6+6=20 часов - автомобиль находился в пути
1470/20=73,5 км/час - средняя скорость движения автомобиля

Answer 2

Calculation of Average Speed

To calculate the average speed of the car during the three-day journey, we need to find the total distance traveled and the total time taken.

On the first day, the car traveled 825 km in 8 hours, which gives us a speed of 825 km / 8 hours = 103.125 km/h.

On the second day, the car traveled 225 km in 6 hours, which gives us a speed of 225 km / 6 hours = 37.5 km/h.

On the third day, the car traveled the remaining distance. Since the total journey took 3 days and the first two days covered 825 km + 225 km = 1050 km, the remaining distance is the total distance minus 1050 km. Given that the car traveled the remaining distance in 6 hours, we can calculate the speed as follows:

Remaining distance = Total distance - 1050 km Remaining distance = 1050 km

Speed = Remaining distance / Time taken Speed = 1050 km / 6 hours Speed = 175 km/h

Therefore, the average speed of the car during the three-day journey is the total distance traveled divided by the total time taken:

Average speed = (825 km + 225 km + 1050 km) / (8 hours + 6 hours + 6 hours) Average speed = 2100 km / 20 hours Average speed = 105 km/h.

So, the average speed of the car during the journey was 105 km/h.

Please note that the calculation assumes a constant speed throughout each day and does not take into account any stops or variations in speed during the journey.