# The train speed is 20 meters per second. The circumference of its wheel is 2.4 meters

The train speed is 20 meters per second. The circumference of its wheel is 2.4 meters. How many revolutions does a carriage wheel make in 3 minutes?

Converting the train travel time from minutes to seconds.
Since 1 minute has 60 seconds, it will be:
3 * 60 = 180 seconds.
We find the distance that the train will travel in the specified time.
We multiply its speed by time.
20 * 180 = 3600 meters.
To find the number of revolutions that a train wheel will complete in a given time, divide the distance traveled by the wheel’s circumference.
3600 / 2.4 = 1500 rpm.
Answer: The wheel will rotate 150 times.

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