problem needs more constraints unanswerable in current form.
if you assume the room is square it is about 18 feet 6 inches wide.
The sq ft of a room 6 ft x 9 ft is 54 ft2.
That room size can be estimated 15 ft x 40 ft
11 ft * 13 ft = 143 sq. ft, so the room has an area of 143 sq. ft
The room is 806 ft2.
And 23 ft x 23 ft room is 529 sq ft.
16ft x 12½ft for example
I would assume it to be 42 ft depending if you are talking about the inside of the room or the outside perimeter
140 sq. ft.
The perimeter is the distance around the room, The reason the perimeter increased by 18 ft is due to both sides of the room that were lengthened by 9 ft.
To calculate the square footage of a room, you multiply the length by the width. In this case, a 10 ft by 15 ft room would be 150 square feet. This is because 10 ft x 15 ft = 150 sq ft.
Square footage of the room = 14 ft * 8 ft = 14*8 sq ft = 112 sq ft.
If square room, then it 13.86 ft x 13.86 ft