Answer:
138 tiles
Step-by-step explanation:
10'8" = 128"
11'8" = 140"
128" / 12" = 10.67. Round up to 11.
140" / 12" = 11.67. Round up to 12.
The number of tiles is 11 × 12 = 132. Add 6 for waste and proper fitting, and you need 138 tiles.
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