Need help finding the correct answer to bio mechanics

The hiking path to the top of a mountain makes, at the steepest place, an angle of 20 degrees with the horizontal and it maintains this constant slope for 500 meters, as illustrated below. Which of the following is the closest approximation to the change in elevation, in meters, over this 500-meter section? (cos 20 = .94; sin 20 = .34; tan 20 = .36) A. 20 500 meters B. 170 ? C. 180 D. 250 20 0 E. 470 170 O 240 225 O 360