While in the Three Sisters Wilderness Area, you decided to try some surveying with the aid of a protractor and a piece of string, as in the figure above. The rock keeps the string pointing straight down, and the straight edge of the protractor can be lined up with an object, allowing you to measure its angle of elevation. When you use this setup to look at something that is at the same elevation you are, the string intersects the mark on the protractor.
First, you lined up the protractor with South Sister, and it read . Then you walked 1 km toward the mountain, lined the protractor up again, and it read . What did you measure South Sister's relative elevation to be, and how far from the mountain were you when you made the second measurement?