Question

According to the Americans with Disabilities Act, a ramp can rise no more than 1 ft for every 12 ft of horizontal distance. What is the maximum angle that a ramp can form with the ground?

Answer 1

what is it?

Answer 2

Calculate the tangent, using that the horizontal distance is b=12, and vertical a=1,
\[\tan\alpha=\frac{a}{b}\]
Then use the result to calculate the angle,
\[\alpha=\arctan(a/b)\]