In order to solve this, you need to find the area of both the pool and the whole area, and then subtract the pool from the whole area to get the area of the tiles. The pool is 10.5 meters long and 6 meters wide.
10.5 × 6 = 63
The area of the pool is 63 square miles.
The whole area is 11 tiles long and 8 tiles wide, and we know each tile is 1.5 meters wide.
11 × 1.5 = 16.5
8 × 1.5 = 12
16.5 × 12 = 198
The area of the tiles and pool is 198 square miles. To find the area of only the tiles, all we have to do is subtract the area of the pool.
198 - 63 = 135
The area of the tile border is 135 square miles.
Hope this helps!
