Question 1201261: If 12 men and 10 women can complete a job in 15 day, how many days will it take for 30 men and 25 women to complete the same job? Answer by ikleyn(52794) (Show Source):
Notice that the work force was increased 2.5 times (from 12 men and 10 women to 30 men and 25 women).
Hence, the work will be complete 2.5 times as fast, i.e. in 15:2.5 = 6 days. ANSWER