Answer:
I think E
Step-by-step explanation:
You know the shortest building is 25 m.
to find the rest, use trigo so Tan(20)=opposite/adjacent.
Adjacent is 50. Do the math and add the answer with 25.
FC is median..
Median is a line from a vertex that equally divides the opposite side...
here FC divides DB therefore it is a median.....
HOPE IT HELPS YOU '_'