That would depend on the size of the tiles.
You need 225 tiles. :)
First we need to calculate the square footage of the room. 15*20 = 300 square feet Now we need to know how many square feet each tile covers. 20" = 1.667~ square feet 1.6672 = 2.78 square feet. Now we divide the area of the tiles into the area of the room. 300/2.78 = 108 tiles. This gives the exact number of tiles you need mathematically. Realistically you need to account for cutting and breaking. It's safe to round that up to 120 tiles.
Assuming the tiles are 1 foot squares, you would need 10*15 = 150 tiles.
Whom ever wrote this problem, did not give the unit of measurement (yards, feet, meters, etc.) so, I am going to presume that the 12 by 12 tile is in inches, and the 15 by 15 is in feet. If my presumption was correct the answer is 15 tiles. Because a 12 by 12 tile is = to 1 square foot. How many 1's fit into 15? 15! Well, not exactly..... You need to multiply 15 X 15 to get the square footage and that will give you the number of tiles needed since the tiles are 1 ft square. 15 x 15= 225. So you need 225 tiles. And add extra tiles for breakage...
You will need 233 30x30cm tiles to cover the room.
That would depend on the size of the tiles.
You need 225 tiles. :)
6 tiles that are 12 ft x 12 ft should be enough.
First we need to calculate the square footage of the room. 15*20 = 300 square feet Now we need to know how many square feet each tile covers. 20" = 1.667~ square feet 1.6672 = 2.78 square feet. Now we divide the area of the tiles into the area of the room. 300/2.78 = 108 tiles. This gives the exact number of tiles you need mathematically. Realistically you need to account for cutting and breaking. It's safe to round that up to 120 tiles.
Assuming the tiles are 1 foot squares, you would need 10*15 = 150 tiles.
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?
Whom ever wrote this problem, did not give the unit of measurement (yards, feet, meters, etc.) so, I am going to presume that the 12 by 12 tile is in inches, and the 15 by 15 is in feet. If my presumption was correct the answer is 15 tiles. Because a 12 by 12 tile is = to 1 square foot. How many 1's fit into 15? 15! Well, not exactly..... You need to multiply 15 X 15 to get the square footage and that will give you the number of tiles needed since the tiles are 1 ft square. 15 x 15= 225. So you need 225 tiles. And add extra tiles for breakage...
In practice you will use more tiles than the equivalent area of the room. A 15 foot strip of tiles will require 15 times 12/13 = 13.846 tiles to cover it. This will have to be rounded to 14 tiles. That means that the 15 foot by 15 foot room will require 14 times 14 tiles = 196 tiles to cover it. And that's if you don't drop and break any or mess up one or more cuts.
120"*120" is 14400 sq. in. 15"*15" is 225 sq. in 14400/225=64 tiles..
If the tiles are 13 in square, an unusual size, there will be 16 one way and 14 the other (ignoring fractions of a tile) so you need 224 tiles.
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?