The area of the room cannot be 64 ft since that is a linear measure, not the measure of an area.
20" = 2.78 square feet. Now divide the area of the tiles into the area of the room. 140/2.78 = 51 tiles
To determine how many 8-inch square tiles will fit into a 224 square foot room, first convert the room's area into square inches. Since 1 square foot equals 144 square inches, a 224 square foot room has 32,256 square inches (224 x 144). Each 8-inch tile has an area of 64 square inches (8 x 8). Dividing the total area of the room by the area of one tile, you get 505 tiles (32,256 ÷ 64).
Area of room = 5' * 6' = 30 square feet. Assuming the tiles are 12 * 12 square inches (not sq cm) then the area of each tile is 1 square foot and so 30 tiles are needed.
16 square tiles
First we need to calculate the square footage of the room. 15*20 = 300 square feet Now we need to know how many square feet each tile covers. 20" = 1.667~ square feet 1.6672 = 2.78 square feet. Now we divide the area of the tiles into the area of the room. 300/2.78 = 108 tiles. This gives the exact number of tiles you need mathematically. Realistically you need to account for cutting and breaking. It's safe to round that up to 120 tiles.
20" = 2.78 square feet. Now divide the area of the tiles into the area of the room. 140/2.78 = 51 tiles
To determine how many 8-inch square tiles will fit into a 224 square foot room, first convert the room's area into square inches. Since 1 square foot equals 144 square inches, a 224 square foot room has 32,256 square inches (224 x 144). Each 8-inch tile has an area of 64 square inches (8 x 8). Dividing the total area of the room by the area of one tile, you get 505 tiles (32,256 ÷ 64).
640
It will take nine 330 by 330 mm tiles to cover one square meter. The room is 144 square meters in area. 9X144=1296 tiles. With a 5mm grout.
Area of room = 5' * 6' = 30 square feet. Assuming the tiles are 12 * 12 square inches (not sq cm) then the area of each tile is 1 square foot and so 30 tiles are needed.
16 square tiles
First we need to calculate the square footage of the room. 15*20 = 300 square feet Now we need to know how many square feet each tile covers. 20" = 1.667~ square feet 1.6672 = 2.78 square feet. Now we divide the area of the tiles into the area of the room. 300/2.78 = 108 tiles. This gives the exact number of tiles you need mathematically. Realistically you need to account for cutting and breaking. It's safe to round that up to 120 tiles.
123 tiles
To calculate how many 12x12 inch tiles are needed for an 8x9 foot room, first convert the room dimensions to inches: 8 feet = 96 inches and 9 feet = 108 inches. The area of the room is 96 inches × 108 inches = 10,368 square inches. Each 12x12 inch tile covers 144 square inches, so divide the total area by the tile area: 10,368 ÷ 144 = 72 tiles needed for the room.
375
291.43 tiles
The answer will depend on the shape of the 168 square feet. The best that you can do, leaving no room for grout, is 42 tiles. However, if the area is circular, you will require more.