20 feet x 10 feet = 200 square feet
140
300 square feet. To calculate square feet simply multiply length by width - the result is the area in square feet.
assuming that you've measured the room in feet, then square area=Width x Length... so 12ft x 20ft = 240ft2
400 square feet
20 feet x 10 feet = 200 square feet
420 square feet. (21 x 20 = 420)
140
There are: 20 times 9 = 180 square feet
20ft x 28ft = 560ft2
18ft*20ft = 360 square feet
If that is 20ft by 20ft then there are 400 square feet
5ft x 4 = 20ft
There are: 20 times 9 = 180 square feet
Multiply the two dimensions to get the area. The calculation will give you 400 square feet.
50ft x 20ft = 1,000 square feet.50ft x 20ft x 4ft = 4,000 cubic feet.
If each side of the square is 20-ft, then the area of the square is (20 x 20) = 400 square feet.