How many 3x6 tiles to cover 30 square feet?

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.