Me. Brust and Mr. Kelly go hot air ballooning one day. Well... Mr. Kelly gets to go air ballooning while Mr. Brust has to drive around and follow the hot air balloon to pick Mr. Kelly when he lands. Just being themselves they decide to do a little math before they land. Mr. Kelly radios and tells Mr. Brust that the altimeter says that he is 100 feet off the ground. He then throws down a rope that is exactly 200 feet long and Mr. Brust attaches to his car so they can do some calculations. Mr. Kelly then radios down that he calculated the angle of depression to be 30°. Who is right? Why?