you * it by the length of your floor
18x20 = 3603x4 = 12360/12 = 30 tiles for the floor :)
You would need 56 tiles to do the floor
52 tiles (with a bit left over !)
168
100 of them.
Floor tiles do not kill cockroaches. You will need to use a pesticide.
The number of tiles needed to cover the floor is a function of the size of the tiles
18x20 = 3603x4 = 12360/12 = 30 tiles for the floor :)
The tiles do not have to be black, they just make it to be black.
You would need 56 tiles to do the floor
52 tiles (with a bit left over !)
28 You need to work out the area of the floor which is 5.5*5 = 27.5ft2 Your floor tiles are 1ft2 each so you need 27.5 of them. Generally you can't get half tiles so you'd need 28 and cut one in half.
108 carpet tiles
168
100 of them.
39
48 Get 52 to be safe.