To determine how many 3x6 tiles are needed to cover 30 square feet, first calculate the area of one tile. A 3x6 tile has an area of 18 square inches (3 inches x 6 inches). Since there are 144 square inches in a square foot, each tile covers 18/144 = 0.125 square feet. To cover 30 square feet, you would need 30 / 0.125 = 240 tiles.
190
start with 38 tiles.
It will require a minimum of 1,462 tiles. That number will cover about 1,850.34 square feet.
68
Each tile covers 4 square feet. Which means you need 200 tiles to cover 800 square feet, plus spoilage.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
192 tiles
76.6 tiles
67 tiles.
190
Two tiles will suffice since they will cover 36 square feet.
500/1.78 = 281 tiles
start with 38 tiles.
157 18 by 18 tiles are needed to cover 352 square feet.
Each tile covers 4 square feet. You will need 24.75 tiles to cover the area.
You will need at least 67 tiles. This will cover 150.75 square feet.
It will require a minimum of 1,462 tiles. That number will cover about 1,850.34 square feet.