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Continue to ChatThe Road to the Tevis Cup, Post #4: How to calculate the grade of hills https://jessicaeblack.org/the-road-to-the-tevis-cup-post-4-how-to-calculate-grade/
The Road to the Tevis Cup, Post #4: How to calculate the grade of hills https://jessicaeblack.org/the-road-to-the-tevis-cup-post-4-how-to-calculate-grade/