A room measuring 20' x 20' = 400 square feet
18 ft X 20 ft = 360 Square feet
20 ft x 20 ft = 400 square ft
280 square feet.
There are 9 square feet in a square yard. A room 20 x 12 has 240 square feet. Divide that by 9 and you get 26.67 square yards.
400 square feet
A room measuring 20' x 20' = 400 square feet
18 ft X 20 ft = 360 Square feet
12*20 = 240 square feet.
20 ft * 500 ft = 10000 square feet. Rather a large room!
400 square feet.
20 x 20 = 400 The room has 400 square feet on the floor, 400 square feet on the ceiling, and (80 x height of the room) square feet on the walls.
20 X 30 = 600 square feet.
A simple rectangular room 20 feet by 18 feet has 360 square feet.
10 ft x 20 ft room = 200 square feet
400 square feet, at the school I went to.
20 ft x 20 ft = 400 square ft