question on slopes?

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a ramp has a slope of 1/15. if it reaches a doorway that is 2 ft. above ground, how far from the doorway does it begin? hope some one can help thanks.

2006-12-20 10:25:31 · 3 answers · asked by catmuffin 1 in Science & Mathematics ➔ Geography

3 answers

OK the ramp rises 1ft in 15ft so 2ft in 30ft right? So the ramp starts 30ft in front of the door.

2006-12-20 12:11:11 · answer #1 · answered by WINGER 2 · 0⤊ 0⤋

The ramp starts 30 feet from the house at a point 2 feet below the doorway. The length ramp itself can be determined with the Pythagorean Theorem.

r^2 = 30^2 + 2^2 = 900 + 4 = 904
r = sqrt(904) = 30.066593 feet

This is very close to 30 1/15 feet.

2006-12-20 21:10:11 · answer #2 · answered by Northstar 7 · 0⤊ 0⤋

30 ft

2006-12-20 18:29:24 · answer #3 · answered by Jay 2 · 0⤊ 0⤋