The average speed calculation is simple. 36 s e c o n d s which gives you 001666 001666 a repeating decimal so we will approximate with 001666 001666 as miles per second which you can multiply times 3600 3600 to get an average speed of 60 mph 60 m p h. Average speed is measured in units of distance per time and the average speed formula looks like this.
Surface Feet Per minute Cutting speed Speed at which tip of tool travels through material.
Given the distance travelled and the time it took to cover that distance you can calculate your speed using this formula. RPM Revolutions Per Minute Spindle Speed Number of revolutions of spindle per minute SFM Imperial. I wont write down a formula but I will tell you how the rpm is calculated. The formula is speed distance time displaystyle textspeedfrac textdistancetexttime.