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?