posted by reneet .
1) The maintenance crew is doing some work on the arch. The work will be done on the right side of the arch. In order to bring the equipment up the maintenance crew has constructed a temporary ramp from the ground on left side of the arch to the level where the work will be done on the right side. The ramp has a constant rate of rise of 1:5, which means 1 ft. up for every 5 ft. forward.
The Gateway arch is the tallest man-made monument found in the United States in St. Louis Missouri. The gateway arch, which can be closely approximated by a parabola, is 630 feet high and 630 feet across at the base.