7.35 Is what you need
647
Nine square feet is equal to 3.24 20-inch tiles.
20 x 20 = 400 square feet.
There are 100*pi square inches in a 20 inch diameter circle
2.77 square feet.
A square 20-inch tile is 2.78 square feet.
A 20-inch diameter circle contains: 314.16 square inches.
That is 240 square inches. There are 144 square inches in a square foot therefore it is approximately 1.66 square feet.
the answer is 160x144
7.35 Is what you need
647
Nine square feet is equal to 3.24 20-inch tiles.
Approximately 1.4 square feet.
2.78 square feet.
20 x 20 = 400 square feet.
20 feet, 1 inch