Final answer:
The area of the floor plan is 0.002 m².
Step-by-step explanation:
The scale of the floor plan is 1:200. This means that every 1 unit on the floor plan represents 200 units in actual size. To find the area of the floor plan, we need to square the scale factor. The scale factor squared is (1/200)^2 = 1/40000. Since the actual area of the flat is 80 m², we can multiply it by the scale factor squared to find the area of the floor plan. So, the area of the floor plan is 80 m² x 1/40000 = 0.002 m².