Chapter 4.7, Problem 77PE

To meet the requirements of the Americans with Disabilities Act (ADA) a wheelchair ramp must have a slope of $1:12$ or less. That is, for every $1\text{ in}\text{.}$ of “rise,� there must be at least $12\text{ in}\text{.}$ of “run.� (See Example 9)

a. If a wheelchair ramp is constructed with the maximum slope, what angle does the ramp make with the ground? Round to the nearest tenth of a degree.

b. If the ramp is $22\text{ ft}$ long, how much elevation does the ramp provide? Round to the nearest tenth of a foot.