Great Job Namuna. That is the way to find M.P.H. to scale... so this is what they did on zz.com? intersting.

To add to my point, it doesn't necessarily have to be 10 ft. As long as you multiply it to equal 100. (ex. 25 ft. times 4)I said 10 because I thought it would be more convinient to most people , because you may not have a big space to measure. My original equation was 100 ft.