A drawing of a building with a scale of 1:100 shows that its length is 60cm and the ratio of length to width is 4:1. What is the actual floor area of the building?
Length 60x100 = 6000cm = 60m
Width 60 △ 4 = 15m
Area 60x15 = 900 square meters
Length 60x100 = 6000cm = 60m
Width 60 △ 4 = 15m
Area 60x15 = 900 square meters