The answer will depend on whether the tiles are 4.25 inch squares (4.25"x4.25" = 18.0625 sq in) or 4.25 square inches.
5 square feet = 5*144 sq in = 720 sq inches.
In the first case, 39.86 ie 39 tiles will fit, leaving some space over.
In the second case, 169.4 is 169 tiles will fit.
This assumes that the off-cuts are used up.
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The perimeter of a square is 100 inches. How many square tiles 1 inch on each edge are needed to cover its area?
A 72-inch diameter circle has an area of: 28.3 square feet.
Divide both sides by 12 to change to feet:- 8/12 times 16/12 = 8/9 square feet
Couple of ways to do perform this task: (1) The area of each tile is 18 x 18 inches = 324 square inches. Calculate the area of the room in Inches: 9 ft (108 in) x 12 ft (144 in) = 15552 square inches. Take the area of the room, divided by the area of each tile: 15552 sq in/ 324 sq in = 48 tiles. (2) Determine how many tiles you need to span the width of the room. 9 feet divided by 18 inches is the same as saying 9 feet divided by 1.5 feet = 6 tiles across Determine how m any tiles you need to span the length of the room. 12 feet divided by 18 inches is the same as saying 12 feet divided by 1.5 feet = 8 tiles across 6 tiles wide x 8 tiles long = 48 tiles.
500 sq feet = 500*12*12 = 72000 sq inches Each tile is 20*20 = 400 sq inches So, number of tiles required = 72000/400 = 180 This assumes that either the shape is such that only whole tiles are required or that all offcuts are used.