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10 men working 6 hours a day can complete a work...

This question belongs to Arithmetic Ability Time And Work
Time and Work
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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 same work in 12 days ?

Answer & Solution
Correct Answer: Option A
$$\eqalign{ & \frac{{{{10}_{{\text{men}}}} \times {6_{{\text{hours}}}} \times {{18}_{{\text{days}}}}}}{{{1_{{\text{work}}}}}} = \frac{{{{15}_{{\text{men}}}} \times {{12}_{{\text{days}}}} \times {\text{H hour/day}}}}{{{1_{{\text{work}}}}}} \cr & \Leftrightarrow {\text{6 hours/day}} \cr} $$
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