A wheelchair ramp is to be built beside the steps to the campus library. Find the angle of elevation of the 20 -foot ramp, to the nearest tenth of a degree, if its final height is 5 feet.

14.5°

Step-by-step explanation:

length of ramp, l = 20 foot

height of ramp, h = 5 foot

Let θ is the angle of inclination

Sin θ = h/l

Sin θ = 5 / 20

Sin θ = 0.25

θ = 14.5°

Thus, the inclination of ramp is 14.5°.