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

January 13, 2021 | education

| **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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