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Old 07-18-07, 09:55 AM
  #20  
toucci
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Join Date: Jun 2007
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It's simple geometry really. I usually use the pythagorean theorem to calculate the slope, IE on a 1 mile , 500 foot climb

a^2+b^2=c^2
a^2+250000=27878400
a=5256

rise/run = b/a = 500/5256 = ~0.095 or 9.5% gradient
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