Question

Помогите пожалуйста, очень срочно надо! Мотоциклист движется равномерно со скоростью 20 м/с в течение 10 минут затем останавливается отдохнуть 5 минут но он снова отправляется в путь едем в течение 20 минут со скоростью 15 м/с. Определите его среднюю скорость

Answer 1

Ответ:

Пошаговое объяснение:

1 минута = 60 секунд

10 минут = 600 секунд

20 минут = 1200 секунд

1) 20 * 600 = 12000 (м) = 12 (км) - проехал за 10 минут

2) 15 * 1200 = 18000 (м) = 18 (км) - проехал за 20 минут

3) 10 + 20 = 30 (мин) = 0,5 (часа) - был всего в

пути

4) 12 + 18 = 30 (км) - проехал всего

5) 30 : 0,5 = 60 (км/ч) - средняя скорость

Ответ: 60 км/ч

Answer 2

Это типо графика ну вот как то так

Answer 3

Calculation of Average Speed

To calculate the average speed of the motorcyclist, we need to find the total distance traveled and the total time taken.

The motorcyclist travels at a speed of 20 m/s for 10 minutes, which is equivalent to 10 * 60 = 600 seconds. During this time, the motorcyclist covers a distance of 20 m/s * 600 s = 12,000 meters.

Afterward, the motorcyclist stops to rest for 5 minutes, which is equivalent to 5 * 60 = 300 seconds.

Then, the motorcyclist continues the journey for 20 minutes, which is equivalent to 20 * 60 = 1,200 seconds, at a speed of 15 m/s. During this time, the motorcyclist covers a distance of 15 m/s * 1,200 s = 18,000 meters.

To find the total distance traveled, we add the distance covered during the first leg (12,000 meters) and the distance covered during the second leg (18,000 meters), resulting in a total distance of 12,000 meters + 18,000 meters = 30,000 meters.

To find the total time taken, we add the time taken during the first leg (600 seconds), the rest time (300 seconds), and the time taken during the second leg (1,200 seconds), resulting in a total time of 600 seconds + 300 seconds + 1,200 seconds = 2,100 seconds.

Finally, we can calculate the average speed by dividing the total distance traveled by the total time taken: 30,000 meters / 2,100 seconds = 14.29 m/s.

Therefore, the motorcyclist's average speed is approximately 14.29 m/s.