420
Read your own question! The square footage is 20!
To calculate the square footage of a room, you multiply its length by its width. For a room that is 21 feet long and 14 feet wide, the square footage would be 21 x 14 = 294 square feet.
400
400 square feet
if you want the square footage, 15 ft x 20 ft is 300 square feet
The question does not give the units of measurement for the room's size. Assuming they are feet, the square footage is 20*12 = 240 square feet.
If each side of the square is 20-ft, then the area of the square is (20 x 20) = 400 square feet.
15 * 20 = 300 square feet.
In terms of square footage, 20 acres = 871,200 square feet.
740
525 square feet (21 x 25)
2o acres is 871,200 square feet.