Approximately 69 Square Feet.
20
16 square feet with less than one square foot of tile remaining
You will need approximately 23.4 tiles, so 24 tiles. Assuming 13x13 tiles is in inches.
These 327 tiles will cover an area of 383.8 square feet.
The best way to figure out how many 13x13 tile will be needed to cover 30 sf of floor is to calculate 13x13/144 give coverage per tile (1.1736), then take 30/1.736 = 25.56 tiles.
About 1.2 square feet x 63 tiles
178 Tiles If the square footage is the actual room size you add 10% for wastee
One 13 ft x 13 ft tile covers 169 square feet, so 2 will be enough.
you need a total of 507 tiles to cover this square footage area
That really depends on several different variables including the square footage of the roof itself and the size / type of the tiles being used. Most of the time when buying roofing tiles / shingles it will state on the packaging how many square's it will cover. It should also state the "square footage" covered as well. So once you have your square footage you can then figure out how many tiles / shingles it will take to cover your roof. Don't forget to add 10 to 15% for waste in your calculations.
the dimensions of one tile is 13x13 inches or 1.083x1.083 feet. Therefore area of one tile is 1.1736 square feet and that of 196 tiles is 196x1.1736=230.027
184 would do it but get 185.