A One-Percent Grade A road that rises 1 ft for every 100 ft traveled horizontally is said to have a 1 % grade. Portions of the Lewiston grade, near Lewiston, Idaho, have a 6% grade. At what angle is this road inclined above the horizontal?
Step 1 of 2:
In this question, we need to find the angle of inclination above the horizontal
Increase in grade rise