A motorcycler daredevil is planning a stunt to perform at a county fair. A ramp must be built to give him a 20% grade, or slope. If the vertical height at the end of the ramp must be 19ft to assure that the stunt is a sucess, what must be the length of the horizontal run?
1 Answer | Add Yours
To solve, apply the formula:
`g r a d e = (rise)/(run) *100`
In the the problem, the rise represents the height of the ramp. So, to determine the horizontal run, plug-in grade=20 and rise=19 to the formula. Also, let x be the horizontal run.
Then, multiply both sides by x.
And, divide both sides by 20.
Hence, the horzontal run of the ramp is 95 feet.
Join to answer this question
Join a community of thousands of dedicated teachers and students.Join eNotes