The description is of a wall in 5-dimensional hyperspace rather than the 3 dimensional ordinary space that we, mere mortals, know.
In other words, there are too many measurements. A wall can be 20 ft long, but it cannot be 20 ft x 20 ft long. And so on.
assuming that you've measured the room in feet, then square area=Width x Length... so 12ft x 20ft = 240ft2
(12ft x 12ft) square =144 sq ft. 12ft x (12 ft square) is 1728 cu ft.
20ft * 15ft = 300 square feet.
Area of a circle in square feet = pi*radius2
If each side of the square is 20-ft, then the area of the square is (20 x 20) = 400 square feet.
12 ft x 20 ft = 240 sq. ft.
Valerie is installing a 20ft by 12ft swimming pool surrounded by a 6ft deck. What is the total area of the deck?
The area is 120ft2
20ft X 6.25ft = 62.5 ft2
400 square feet
If that is 20ft by 20ft then there are 400 square feet
If the 18 stands for the radius, then the area formula : A= Pi r2 can be used. The question is standed strangely.