In a 15-ft by 18-ft rectangular room, the area of the floor is 270 square feet,
and the area of the ceiling is also 270 square feet.
It's not possible to calculate the area of the walls without knowing the ceiling height.
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.
15 x 15 = 225 square feet
30 X 15 = 450 square feet.
A 19' x 15' room is 285 square feet or 26.477 square meters.
165 square feet
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.
15 x 15 = 225 square feet
30 X 15 = 450 square feet.
A 19' x 15' room is 285 square feet or 26.477 square meters.
165 square feet
150/400 is one possible answer.
There are 270 square feet in a 15'x18' room.
The floor and ceiling are each (28 x 15) = 420square feet.We don't know the area of the walls until we know how high the room is.
15/100 = 30/200 = 60/400
I just went to the tree store today and they quoted me $400 for a 15 foot shade tree with a 4 inch diameter trunk (at base).
15 x 20 = 300 square feet.
Assuming the tiles are 1 foot squares, you would need 10*15 = 150 tiles.