The American's with Disabilities Act (ADA) is a body of law that created a number of standards to make American buildings accessible to those with impaired movement. Among these standards is a standard that defines the maximum slope a wheelchair-accessible ramp may built to. According to the ADA, no wheelchair ramp can rise faster than one unit vertically for every twelve horizontal units.
What is the shortest length of ramp (as measured from the start of the ramp, at the base, to the end of the ramp, at the top) that you can build to reach a ledge .83 meters from the ground?
