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*speed=distance divide by time*and the formula for finding grade, but what I'm trying to find out is what would be one's average speed on an hill. Example:distance of road, ft. drop between elevations, weight of rider. (1.5mile, 555ft btwn elev,200#) I would like to have this one handy, so I can find out what speeds one could acheive on various roads. I'm also putting a graphics package together and would like to include formulas that are relevant to downhill skateboarding.

Any help would be very much apperciated!

Thank you