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?
