The number of tiles required will be different if they are 20 inch x 20 inch tiles rather than if they are 20 cm x 20 cm tiles. Also, the answer depends on whether the room is 12 foot by 8 ft or 12 metres x 8 metres. In the extreme case, you would need only a single 20 ft x 20 ft tile for a room that is 12 ft by 8 ft.
400
360 tiles.
94.5 plus 20%
240 square tiles are needed
12X20 = 240 sq feet 12"x12" tiles are 1 sq foot each so must be 240/1= 240
If you mean 20 in x 20 in tiles, the 240 sq ft room is 240 x 144 sq in = 34560 sq in. each tile is 20 x20 = 400 sq in tiles needed are 34560/400 = 86.4 tiles, say 90 tiles
20
To find out how many 20-inch tiles you will need to cover 100 sq ft, you first need to calculate the area of one tile. A 20-inch square tile covers 20 x 20 = 400 sq inches. Since 1 sq ft = 144 sq inches, you divide 400 by 144 to get approximately 2.78, meaning it will take about 2.78 tiles to cover 1 sq ft. Therefore, to cover 100 sq ft, you will need about 278 tiles.
assuming you mean 10" by 10" tiles, 200
18x20 = 3603x4 = 12360/12 = 30 tiles for the floor :)
20" = 2.78 square feet. Now divide the area of the tiles into the area of the room. 140/2.78 = 51 tiles
help with percentage of each of the tiles 20 x 20, 11 x 22 and 12 x 12