10 men, working 6 hours a day can complete a work in 18 days. How many hours a d

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โœช Choose the correct option.

10 men, working 6 hours a day can complete a work in 18 days. How many hours a day must 15 men work to complete the work in 12 days ?

A. 4 hours a day
B. 5 hours a day
C. 6 hours a day
D. 7 hours a day

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