To determine the number of 12x12 inch tiles needed to cover 400 square feet, first calculate the area of one tile in square feet. Each tile covers 1 square foot (12 inches x 12 inches = 144 square inches = 1 square foot). Then divide the total area to be covered (400 square feet) by the area of one tile (1 square foot) to find the total number of tiles needed. In this case, it would take 400 tiles to cover 400 square feet with 12x12 inch tiles.
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195 12 inches x 12 inches is 1 square foot
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A A 12x12 sq feet tile covers 144 sq feet. So to cover 1200 sq feet you will need 1200/144 = 8.3 or 9 tiles.
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