How Many Square Feet In 6 Pieces Of 20 X 20 Tile?

Each tile has an area of
(20 in)^2 = ((20 in)/(12 in/ft))^2 = (20/12)^2 ft^2 = 2 7/9 ft^2 ≈ 2.78 ft^2

6 pieces of tile have an area of
6*(2 7/9 ft^2) = 16 2/3 ft^2