178 tiles
If your tiles are 12 inches by 12 inches they are equal to 1 sq ft, so you would need 54 tiles.
12" x 12" = 1 ft x 1 ft = 1 square foot 220 tiles to cover 220 square feet
If the tiles are 12 inches square... 8352 tiles ! However if they're 12 feet square... 58 tiles
320
One tile that is 12 ft by 12 ft will be more than enough.
12 can go into a 100 two times
178 tiles
6 tiles that are 12 ft x 12 ft should be enough.
If they are 1 ft x 1 ft tiles, don't u need 104 of them?
If your tiles are 12 inches by 12 inches they are equal to 1 sq ft, so you would need 54 tiles.
12" x 12" = 1 ft x 1 ft = 1 square foot 220 tiles to cover 220 square feet
36 tiles. First you have to convert 20 inches to feet. There are 12 inches in a foot so 20/12 means you have one and two-thirds length tiles. Then, you have to figure out the lenght of the sides of the room which is the square root of 100 sq ft. which is 10 feet long. Now, you have to figure out how many tiles it will take to do one length of the room by 10/one and two-thirds which is 6 tiles. Finally you have to multiply the length times the width to get how many tiles it takes to fill the room by 6*6=36 tiles
If the tiles are 12 inches square... 8352 tiles ! However if they're 12 feet square... 58 tiles
300
Five tiles will cover 160 square feet so they will cover 100% of 156 square feet with a little excess. A precise coverage will require 4.875 tiles.
Your question is confusing because you are using two different scales. If your room is 10 ft x 12 ft and the tiles are 2 ft x 2 ft, the answer is 30 tiles.