2.78 square feet.
20' x 60' = 1,200 square feet.
20' x 30' = 600 square feet.
20 feet x 10 feet = 200 square feet
40 ft by 20 ft = (40 x 20) = 800 square feet
400 square feet
20 x 20 = 400 square feet.
800 square feet (40 x 20 = 800).
2.78 square feet.
Well, darling, a 16 x 20 room would have a total of 320 square feet. It's as simple as multiplying the length (16 feet) by the width (20 feet). So, go ahead and start measuring those walls if you want to double-check my math.
20' x 60' = 1,200 square feet.
13 x 20 = 260 square feet (13 and 20 must be in feet)
20 x 19 = 380 square feet.
12 x 20 = 240 square feet.
13 x 20 = 260 square feet.
400 square feet.
400 square feet (20 x 20 = 400)