Math CentralQuandaries & Queries


Question from rachel, a student:
if the grade is 18%, how many feet would it fall vertically over a horizontal distance of 250 yards.


"Grade" refers to rise/run, that is vertical distance
change over horizontal distance change. Thus a 100% grade is not vertical, but a 45 degree slope. [The term is most often used for milder slopes, and usually rather approximately, so one can use it for some time without worrying about whether it's
But it's the first one.]

So a grade of 18% rises or falls 18 feet in 100 horizontal feet, 9 yards in 50 horizontal yards, 900 meters in 5 horizontal kilometers, etc.
Good Hunting!



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