**The American with Disabilities Act (ADA) requires that the slope of a wheelchair ramp be no greater than 1:12. Which of the following is the minimum length of a ramp needed to provide access to a door that is 1.5 feet above the sidewalk?**

22 feet

19.5 feet

32.5 feet

18 feet

*Correct Answer : D*

The slope represents the ratio of rise to run. Let p be the minimum length of the ramp, we can set a ratio equation as follows. Then,

The minimum length of the ramp needed is **18 feet** to access to a door that is 1.5 feet above the sidewalk.

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