A task requires 288 labor-hours and must be completed in 3 days with 8-hour shifts. How many workers are needed?
Correct Answer
B) 12 workers
Available hours per worker are 3 x 8 = 24 hr, so 288 / 24 = 12 workers.
Why This Is the Correct Answer
Available hours per worker are 3 x 8 = 24 hr, so 288 / 24 = 12 workers.
Why the Other Options Are Wrong
Option A: 9 workers
crew size from labor hours, choice a: 9 workers backs into 0.38 when divided by 24; the accepted setup gives 0.5 on that same base.
Option C: 18 workers
crew size from labor hours, choice c: 18 workers backs into 0.75 when divided by 24; the accepted setup gives 0.5 on that same base.
Option D: 24 workers
crew size from labor hours, choice d: 24 workers equals 3 x 8. That multiplies those two listed numbers.
Memory Technique
Keep a closeout folder beside crew size from labor hours: if one number is skipped, the option drifts away from 12 workers.
Reference Hint
Open Construction Jobsite Management, 5th Ed. (2024); use by topic index - labor hours / productivity / earned value / job cost to confirm that Available hours per worker are 3 x 8 = 24 hr, so 288 / 24 = 12 workers.
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