The composition-shingle roof worksheet shows a roof sheathing area is 44 feet by 21 feet. How many square feet are needed before waste?
Correct Answer
A) 924 square feet.
Roof sheathing area is length times width: 44 x 21 = 924 square feet.
Why This Is the Correct Answer
Roof sheathing area is length times width: 44 x 21 = 924 square feet.
Why the Other Options Are Wrong
Option B: 902 square feet total.
902 square feet total. is below the supported result for roof sheathing quantity calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 946 square feet total.
946 square feet total. is above the supported result for roof sheathing quantity calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 968 square feet total.
968 square feet total. is above the supported result for roof sheathing quantity calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Measure to area, adjust for length, then let Estimating Detached set the finish line.
Reference Hint
Study anchor (closed-book): memorize Roof sheathing quantity calculation from California Building Code, California Code of Regulations Title 24. / Title 24 California Building Code roof sheathing quantity concepts; know the rule or calculation trigger without relying on exam-room lookup.
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