Question

Помогите решить пожалуйста!!!!(( №1 Мотоциклист за первые 1,5 часа проехал путь 40 км, а следующие 2,5 часа двигался со скоростью 50 км\ч. Найдите среднюю скорость на всем пути? №2Скорость поезда при подъёме 40км\ч , а на спуске 80 км\ч. Найдите среднюю скорость на всём пути если спуск в 3 раза длинее подъёма? пожаааалуйста решите!!(((

Answer 1

1.
Средняя скорость - это отношение всего пути ко всему времени.

$Vcp=\frac{S_1+S_2}{t_1+t_2} \\\\Vcp=\frac{50+40}{1,5+2,5}=22,5\ \frac{m}{c}$

2. В вложении.

Answer 2

Task 1: Finding the average speed for a motorcyclist

To find the average speed for the entire journey, we need to calculate the total distance traveled and the total time taken.

Given information: - The motorcyclist traveled 40 km in the first 1.5 hours. - The motorcyclist traveled at a speed of 50 km/h for the next 2.5 hours.

To find the total distance traveled, we add the distance traveled in the first 1.5 hours to the distance traveled in the next 2.5 hours: - Distance traveled in the first 1.5 hours: 40 km - Distance traveled in the next 2.5 hours: 50 km/h * 2.5 h = 125 km

Total distance traveled: 40 km + 125 km = 165 km

To find the total time taken, we add the time taken in the first 1.5 hours to the time taken in the next 2.5 hours: - Time taken in the first 1.5 hours: 1.5 hours - Time taken in the next 2.5 hours: 2.5 hours

Total time taken: 1.5 hours + 2.5 hours = 4 hours

Now, we can calculate the average speed by dividing the total distance traveled by the total time taken: - Average speed = Total distance / Total time = 165 km / 4 hours = 41.25 km/h.

Therefore, the average speed for the entire journey is 41.25 km/h.