SOLUTION: The grade of a highway up a hill is 20%. How much change in a horizontal distance is there if the vertical height of the hill is 80 feet?

Question 815556: The grade of a highway up a hill is 20%. How much change in a horizontal distance is there if the vertical height of the hill is 80 feet?

Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
g = 100 * rise / run
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g = 100 * rise / run
20 = 100 * 80 / run
20 = 8000 / run
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run = 8000 / 20
run = 400 ft
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