4 workers need 12 days for a job. How many days would 6 workers need at the same pace?
Answer and explanation
Correct answer: D. 8
- Step 1: Total work = 4 x 12 = 48 worker-days. Step 2. 48 / 6 = 8 days. Answer: 8. Why not the others: 18: direct proportion was used instead of inverse. 10: the numbers were added and subtracted. 9: an extra factor of 2 was applied.
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