Math word problem need help

Question

A square plot of land has a building 40 ft long and 20 ft wide at one corner. The rest of the land outside the building forms a parking lot. If the parking lot has area 9,200 ft², what are the dimensions of the entire plot of land?

Answer 1

the size of the building is 40x20 = 800 sq ft. Add this to the 9200 sq ft parking lot and this equals 10000 sq ft which is a square lot 100'x100'