Question: How may 6 inches by 6 inches tiles do I need to buy for an area of 9.5 feed wide and 12 feed long?
The width is 9.5 feet, which is 2*9.5 = 19 lots of 6 inches.
So, in the first row there are going to be 19 tiles.
Each tile in the first row is 6 inches deep, or 0.5 feet deep.
Total depth of room is 12 feet, which is 12*2 = 24 lots of 6 inches.
So there must need to be 24 rows to cover the entire room.
24 rows with 19 tiles in each row means that the total number is tile is given by: 24*19 = 480 - 24 = 456
Number of tiles needed = 456