A 3:1 grade has an 18 foot run, what is the height?

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Multiple Choice

A 3:1 grade has an 18 foot run, what is the height?

Explanation:
A 3:1 grade means for every 3 units of horizontal distance, the vertical rise is 1 unit. So rise equals run divided by 3. With an 18-foot run, the height is 18 ÷ 3 = 6 feet. Therefore, the height is 6 feet. The other numbers don’t fit this 3:1 relationship with an 18-foot run.

A 3:1 grade means for every 3 units of horizontal distance, the vertical rise is 1 unit. So rise equals run divided by 3. With an 18-foot run, the height is 18 ÷ 3 = 6 feet. Therefore, the height is 6 feet. The other numbers don’t fit this 3:1 relationship with an 18-foot run.

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