68 feet = 816 inches, and 816/16 = 51 tiles will fit along that length. Along the other length of the floor, the tiles won't fit evenly; they will have to be cut. 81 feet = 972 inches, and 972/16 = 60.75. Two choices:
(1) Only use 60 tiles across that length of the room, but there will be empty space. That means 51*60 = 3060 tiles will fill the entire floor.
(2) Fill the emtpy space with an extra row of tiles that are cut to a smaller size. So round up 60.75 to 61 which means you'll need 51*61 = 3111 tiles.
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16 square tiles
224 x 144 = 32,256 / 256 (16 x 16) = 126 16 x 16 tiles.
94.5 plus 20%
Assuming the tiles are 16 inches square:200 square feet = 200 x 12 x 12 = 28,800 square inches.The tiles are 16 x 16 = 256 square inches.28,800 / 256 = 112.5So you would need a minimum of 113 tiles, not allowing for any that would need cutting at the edges of the room.
i cant give you an answer with out know how big the tiles are sorry :(