You have to multiply the two dimensions to get the area. In this case the answer will be 44 square feet.
80
How big is a wall that is 15 square feet?
36 square feet on the floor. 36 square feet on the ceiling. ( 6 x height of the room) on each wall. Total area inside the room is [ 24 times (3 + height of the room) ] square feet.
10 x 12 = 120 sq ft
96 square feet.
58.33 square feet
60
on a wall it would be 100 square feet.
You have to multiply the two dimensions to get the area. In this case the answer will be 44 square feet.
9 square feet = 1 square yard Area of the wall (each side of it) = 9' x 13' = 117 square feet = 13 square yards.
20 square feet. Multiply length by width - the result is the area in square feet.
80
80 ft
Multiply the two dimensions to get the area. In this case the calculations gives you 1860 square feet.
4 feet times 3 feet equals 12 square feet.
8-ft x 12-ft = 96 square feet