If 6 men can dig a trench in 10 days, how many men are needed to dig it in 4 days?
A15CORRECT
B24
C20
D12
Common EntranceMathematicsInverse Proportion
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Why the answer is A, and why the others tempt you.
The job takes 6 x 10 = 60 man-days. To finish in 4 days you need 60 ÷ 4 = 15 men.
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