Question

втомобиль проехал 15 км за 20 минут, потом 750 м км за 45 секунд, а затем ещё 7 км за 1 час. Какова средняя скорость автомобиля? Ответ запишите в системе СИ.а

Answer 1

средняя скорость=все расстояние/все время в пути.

Решение:

1)15+50=65км-всего проехал.

2)20+40=60мин=1ч

3)65:1=65км/ч-средняя скорость за всё время движения

Ответ:65км/ч средняя скорость за всё время движения

Answer 2

Calculation of Average Speed

To calculate the average speed of the car, we need to find the total distance traveled and the total time taken. Let's break down the given information:

- The car traveled 15 km in 20 minutes. - The car traveled 750 m in 45 seconds. - The car traveled an additional 7 km in 1 hour.

To find the total distance traveled, we add up the distances from each segment:

- 15 km + 0.75 km + 7 km = 22.75 km

To find the total time taken, we add up the times from each segment:

- 20 minutes + 45 seconds + 1 hour = 1 hour and 20 minutes and 45 seconds

Now, let's convert the total time taken to hours:

- 1 hour + 20 minutes + 45 seconds = 1.34 hours

Finally, we can calculate the average speed using the formula:

Average Speed = Total Distance / Total Time

Substituting the values:

Average Speed = 22.75 km / 1.34 hours

Calculating the average speed:

Average Speed ≈ 17.01 km/h

Therefore, the average speed of the car is approximately 17.01 km/h.