- A10 workers
- B30 workers
- C5 workers
- D15 workers
Step-by-Step Solution
40% took 300 worker-days, so the job is 750. Left 450 in 15 days needs 30 workers; hire 10 more.
Answer: A) 10 workers
A contractor promises a job in 30 days and hires 20 workers. After 15 days, only 40% is done. How many more workers must he hire to finish on time?
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