Question

скорость поезда 20 м/с.длина окружности его колеса 2,4 м. сколько оборотов совершает колесо поезда за 3 мин.

Answer 1

3мин=180сек
20м/с х 180 сек =3600м
3600м:2,4м=1500

Answer 2

s=20*(3*60)=3600м

3600\ 2.4=1500 оборотов 

Answer 3

Calculating the Number of Wheel Revolutions

To calculate the number of wheel revolutions the train wheel makes in 3 minutes, we can use the formula:

Number of revolutions = Distance traveled / Circumference of the wheel

Given: - Speed of the train = 20 m/s - Circumference of the wheel = 2.4 m - Time = 3 minutes

First, let's convert the time from minutes to seconds: - 3 minutes = 3 * 60 seconds = 180 seconds

Now, we can calculate the number of wheel revolutions: - Distance traveled = Speed * Time - Number of revolutions = Distance traveled / Circumference of the wheel

Calculation

- Distance traveled = 20 m/s * 180 s = 3600 m - Number of revolutions = 3600 m / 2.4 m = 1500 revolutions

So, the train wheel makes 1500 revolutions in 3 minutes.