Take your current speed in either kmph or mph. First choose two points that lie the line - say point A is 0 0 and point B is 10 50. Where v is the velocity average speed t is the time and d is distance so you can read it as Distance Speed x Time.
Given One Distance and One Time Period 1.
The formula for speed is speed distance time. Divide it by 60 to get kilometers per minute or miles per minute. Performing a conversion from RPM to speed in a linear direction involves two steps. Plug the distance into the formula.