Question

Мотоциклист за первые два часа проехал 90км а следующие три часа двигался со скорость 50 км/ч Какова средняя скорость мотоциклиста на все пути

Answer 1

Vср.=(2*90+3*50):(2+3)=(180+150):5=330:5=66(км/ч).

Answer 2

Средняя скорость = путь / время
Путь = 90км + 50км/ч * 3ч = 240 км
Время = 2ч+3ч=5ч
Средняя скорость = 240км / 5ч =48 км/час

Answer 3

Calculating Average Speed of the Motorcyclist

To calculate the average speed of the motorcyclist for the entire journey, we can use the formula:

Average Speed = Total Distance / Total Time

Let's calculate the average speed step by step.

1. Calculating Total Distance: - The motorcyclist traveled 90 km in the first two hours. - Then, the motorcyclist traveled at a speed of 50 km/h for the next three hours. - Therefore, the total distance traveled can be calculated as: - Total Distance = Distance in First 2 Hours + Distance in Next 3 Hours

2. Calculating Total Time: - The total time taken for the entire journey is 2 hours (first two hours) + 3 hours (next three hours).

3. Calculating Average Speed: - Using the formula: Average Speed = Total Distance / Total Time

Let's calculate the average speed using the provided information.

Calculation

1. Calculating Total Distance: - Distance in First 2 Hours = 90 km - Distance in Next 3 Hours = Speed * Time = 50 km/h * 3 h = 150 km - Total Distance = 90 km + 150 km = 240 km

2. Calculating Total Time: - Total Time = 2 hours + 3 hours = 5 hours

3. Calculating Average Speed: - Average Speed = Total Distance / Total Time - Average Speed = 240 km / 5 hours - Average Speed = 48 km/h

So, the average speed of the motorcyclist for the entire journey is 48 km/h.