Depends on the size of the tiles.
18-in = 1.5 feet18-in x 18-in = 1.5-ft x 1.5-ft = 2.25 square feet48 tiles of this size have total area of (2.25 x 48) = 108 square feet
The smallest size would be 15x15 feet which is 225 feet2. That is 9, 5x5 feet tiles. Or it is 25, 3x3 feet tiles.
You would need 29 tiles of that size to cover that area (28.77 tiles) to be precise,
Ceiling tiles are not all the same size, but I have often seen them in the size one foot by one foot.
Depends on the size of the tiles.
18-in = 1.5 feet18-in x 18-in = 1.5-ft x 1.5-ft = 2.25 square feet48 tiles of this size have total area of (2.25 x 48) = 108 square feet
The smallest size would be 15x15 feet which is 225 feet2. That is 9, 5x5 feet tiles. Or it is 25, 3x3 feet tiles.
That depends entirely on the SIZE of the tiles ! A tile size of 1 ft2 would need 112 tiles, whereas a tile size of 6in2 would need 448 !
You would need 29 tiles of that size to cover that area (28.77 tiles) to be precise,
Ceiling tiles are not all the same size, but I have often seen them in the size one foot by one foot.
178 Tiles If the square footage is the actual room size you add 10% for wastee
There is not enough info as to the feet and inches of a bookcase. Bookcases can be of any size.
85 square feet is the area of a room that measures eight by ten and a half feet. This is the size of a typical second bedroom. If there was a floor tile that measured 12 inches by 12 inches, this would be 85 floor tiles.
Roughly, 315 tiles. First, you must convert the size of your tiles (inches) to the same measurement used to describe the room size (square feet). To figure the number of square feet per tile: 16" x 16" = 256 square inches per tile. Next, consider that there are 144 square inches in one square foot (12 in x 12 in). Now calculate: 256 (square inches per tile) divided by 144 (square inches in a square foot) = 1.78 sq in per tile. Now your units of measurement are the same - square feet. So you can now calculate how many tiles are needed for the space: 560 sq feet divided by 1.78 sq feet per tile = 314.6 tiles. Remember to add 5-7% extra for waste, because you'll cut the tiles to fit around edges and won't use every little scrap. Realistically, you'll need 330-337 tiles total for the project.
76 inches wide by 80 inches long
I don't suppose you considered the fact that the answer would depend on whether the tiles are 40cm*40cm or 40 inch*40 inch or 40*40 in some other units.