Dave is laying tile in his bathroom. The bathroom floor is rectangular and measures 12 foot by 15 foot. He won't need to tile the space where the 3 foot by 3 foot shower sits nor where the 3 foot by 2.5 foot cabinet sits. Each tile is square, and measures 18 inches on each side. If only boxes containing 25 tiles each are available, what is the minimum number of boxes Dave needs to buy in order to tile his bathroom?

Question

anonymous · Answer

|dw:1346549566532:dw|Area of a rectangle = Length * width. Find the net area of bathroom, subtract from it the area that he doesn't need to lay tiles on; (Area of the cabinet + the area of the shower). Also find the area of one tile. The number of tiles (n) required will be $$n = \frac{Total- area-to-be -tiled}{area- of-one-tile}$$Since one box has 25 tiles find the number of boxes that will have n number of tiles.