What is the formula to calculate speed in km/h from angular velocity in rpm and diameter ?

The formula to calculate a linear velocity expressed in kilometers per hour [km/h] from an angular velocity expressed in revolutions per minute [rpm] and a diameter to is given by:



Where:

•  is the linear velocity expressed in kilometers per hour (km/h)
•  is the angular velocity expressed in revolution per minute (rpm)
•  is the diameter expressed in meters (m)