Each tile is 1 square foot.
The area may be calculated using this formula: A = (length of each tile in inches) x (width of each tile in inches) x (number of tiles in one box)
Presume thats 18 inches square tiles, then each tile = 1.5 * 1.5 = 2.25 sq ft > So, 200 / 2.25 = 88.88 tiles
18 cases Math: each tile is 5in X 5in = 25 square inches per tile 25 square inches per tile X 75 tiles per box = 1875 square inches per case 1875 square inches per case / 144 square inches per square foot = 13 square feet per case 225 square feet in the room / 13 square feet per case = 17.3 cases or 18 full cases.
54 tiles are needed
Each tile is 1 square foot.
The perimeter of a square is 100 inches. How many square tiles 1 inch on each edge are needed to cover its area?
Each tile will cover 100 square inches. 12,000 square feet is 1,728,000 square inches. You will need 17,280 tiles.
Each tile covers 81 square inches. You have 1,296 square inches to cover. It will take 16 tiles to cover that area.
It is 50 square feet.
Assuming you mean 18 inch tiles... 290 square feet is 41,760 square inches. Each tile is 324 square inches - so you would need 129 tiles in total (with a fraction of a tile left over)
The area may be calculated using this formula: A = (length of each tile in inches) x (width of each tile in inches) x (number of tiles in one box)
There are 2.54 centimeters in one inch. First, I would find the square footage of each tile. (15/2.54)*(59.5/2.54)=(5.906*23.425)=138.348 square inches per tile Now, we would divide that number by 144 (the number of square inches in a square foot) to find the square footage of each tile (138.348/144=.96sqft/tile) Now divide your total you want to cover (428sqft) by your sqft/tile (.96sqft) and you get 445.83, so, 446 tiles to cover the area desired. If you're laying it, I would figure in 10% for waste, making your total 491 tiles. ...and that is without grout joints :)
Presume thats 18 inches square tiles, then each tile = 1.5 * 1.5 = 2.25 sq ft > So, 200 / 2.25 = 88.88 tiles
18 cases Math: each tile is 5in X 5in = 25 square inches per tile 25 square inches per tile X 75 tiles per box = 1875 square inches per case 1875 square inches per case / 144 square inches per square foot = 13 square feet per case 225 square feet in the room / 13 square feet per case = 17.3 cases or 18 full cases.
54 tiles are needed
If you're talking floor tiles as opposed to wall tiles and by 12x12 you mean they are 12 inches square, then the answer is 300. Because each tile is one square foot and a 15'x20' room is 300 square feet. Simple, eh?