150 tiles
A quarter of one tile (6 ft * 20 ft) will be sufficient!
12 inches = 1 foot Thus the tiles would be 1 foot square. You therefore need 30 to cover a 30 square foot room.
480
60
150 tiles
Lets do length and width in terms of tiles. The length is 6m/0.2m/tile 30 tiles and the width is 5m/0.2m/tile 25 tiles. Then the area is l X w 30 tiles X 25 tiles 750 square tiles. Since each tile is square, 750 tiles.
A quarter of one tile (6 ft * 20 ft) will be sufficient!
30
The answer depends on the shape of the 30 square feet area. If it is in the form of a strip that is 5 inches wide and 72 feet long and you don't want mosaics with little offcuts, then you will require 144 tiles.
Assuming that 12 x 12 is 12" x 12" (one square foot), then 30 one-square-foot tiles would cover 30 square feet.
12 inches = 1 foot Thus the tiles would be 1 foot square. You therefore need 30 to cover a 30 square foot room.
480
60
120 tiles because the area of the floor is 30 square feet. If you can fit four tiles into one square foot then you could fit 120 tiles in 60 square feet.
Area of each tile = 30*30 = 900 mm2. Area to be covered = 1000*1000 = 1,000,000 mm2 So, number of tiles required = 1,000,000/900 = 1111.11... tiles.
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.