8 workers can build a wall in 6 days. How many days will 12 workers take at the same rate?
A9
B4CORRECT
C3
D5
Common EntranceMathematicsInverse Proportion
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Why the answer is B, and why the others tempt you.
Work = 8 x 6 = 48 worker-days; 48 / 12 = 4 days.
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