- A10 hours
- B6 hours
- C8 hours
- D9 hours
Step-by-Step Solution
Worker-hours per metre: . 150 m needs 1200; .
Answer: C) 8 hours
10 workers build a 120 m wall in 12 days working 8 hours a day. How many hours a day must 15 workers work to build 150 m in 10 days?
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