20" = 2.78 square feet. Now divide the area of the tiles into the area of the room. 140/2.78 = 51 tiles
1070 square feet is 154080 square inches. (1 square foot is 12x12 or 144 square inches.)a 20x20 inch tile is 400 square inches.So the question could be restated as "how many 400 square inch tiles does it take to cover 154080 square inches?"154080 / 400 = 385.2
20X20" tiles are 1.67'X1.67' giving a total sq ft per tile of 2.8 s/f 100 tiles would cover 280 sq feet so looks like 97 tiles gets you to 272. we always recommend about 5-7% overage to allow for a broken tile or a bad cut.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
400 (20x20) square inches is 2.78 square feet.
comes out to about 126 tiles, but would get 140 depending on amount of cuts there are and can always take the extras back.
Since a 12x12 tile is one square foot, then 38 12x12 tiles will cover 38 square feet.
Two tiles will suffice since they will cover 36 square feet.