For completing a work 6 people take 1 year and 3 months. How many months take if 9 people completed the same work?
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completing a work 6 people take = 1 year and 3 month = 15 months
1 man take time to complete work = 90 months
9 man take time to complete work = 90/9 = 10 months
9 man take time to complete work = 10 months
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