In the United States, length is usually measured in inches, feet, and miles. Most of the rest of the world uses centimeters, meters, and kilometers. Would a 20% grade (referring to the slope of a roadway) in America equal a 20% grade elsewhere? Explain why or why not.

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23 June, 12:13

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Cordell Blackwell · Answer 1

Yes.

Ratios of like quantities don't have units. (The units cancel.)

(1 m) / (100 m) = (1 ft) / (100 ft) = 1% grade - - no matter where you are.