A tile room is 8 feet by 10 feet, and 10 percent waste is added. How many square feet of tile should be ordered?
Correct Answer
A) 88 square feet.
The room is 80 square feet. Ten percent waste is 8 square feet, so 88 square feet should be ordered.
Why This Is the Correct Answer
The room is 80 square feet. Ten percent waste is 8 square feet, so 88 square feet should be ordered.
Why the Other Options Are Wrong
Option B: 80 square feet.
80 square feet. is below the supported result for tile quantity calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 90 square feet.
90 square feet. is above the supported result for tile quantity calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 96 square feet.
96 square feet. is above the supported result for tile quantity calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Ordering Laundry takeoff: count the condition before counting the package.
Reference Hint
Study anchor (closed-book): memorize Tile quantity calculation from CSLB B General Building Study Guide; California Building Code, Title. / CSLB B General Building Study Guide tile estimating; know the rule or calculation trigger without relying on exam-room lookup.
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