Train speed 20m / s. Wheel circumference 2.4m. how many revolutions do the wheels make in 3 minutes?

1. Let’s translate the train speed in m / min:
20 m / s = 20 m / 1/60 min = 1200 m / min.
2. Let’s find the distance the train will cover in 3 minutes, for this we multiply its speed by 3 minutes:
3 min * 1200 m / min = 3600 m.
3. Divide the resulting distance by the circumference of the train wheel, we get the number of revolutions that the wheels make in 3 minutes:
3600 m / 2.4 m = 1500 revolutions.
Answer: the wheels make 1500 revolutions in 3 minutes.