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0.44444 square feet per tile.
18 cases Math: each tile is 5in X 5in = 25 square inches per tile 25 square inches per tile X 75 tiles per box = 1875 square inches per case 1875 square inches per case / 144 square inches per square foot = 13 square feet per case 225 square feet in the room / 13 square feet per case = 17.3 cases or 18 full cases.
How many 20X20 tilesIf this is homework the answer looks like this20X20= (sq inches per tile)¨Sq Inches per tile divided by 144 = (sq feet per tile)(About 2.8 sq ft per tile) but do your own math, that's what a cell phone calculator is for,divide 400 by sq feet per tile= your # of tiles neededIf this is the real world there are grout lines, miscuts & broken tile & undersized tiles to consider, ask the guy at home depot to figure it.. I would expect. 140-160 tiles on your cart at check out
12" x 24" = 1' x 2' = 2 square feet per tile7' x 10' = 70 square feet on the floor of the roomAssuming that you only want to tile the floor, 70/2 = 35 tiles.
You may want to use a calculator. 18 in x 18 in =? square inches There are 144 square inches in a square foot. Divide the square inches in one tile by 144. That should equal about 2.25 square feet per tile. 425 divided by the square feet in one tile -- that would give you the number of tiles. It would take about 189 tiles.