SOLUTION: 30 men can do a certain work in 15 days. They started working on the project but 5 of them leave after every five days. In how many days will the work be completed now?

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Question 978145: 30 men can do a certain work in 15 days. They started working on the project but 5 of them leave after every five days. In how many days will the work be completed now?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
r, the one-man rate
30r%2A15=1 for ONE JOB.
highlight_green%28r=1%2F450%29


THEY work for 5 days, and then 30-5=25 of them continue to work to completion of the one job.

highlight%28%2830%2F450%29%2A5%2B%2825%2F450%29%2At=1%29

Answer by MathTherapy(10553) About Me  (Show Source):
You can put this solution on YOUR website!
30 men can do a certain work in 15 days. They started working on the project but 5 of them leave after every five days. In how many days will the work be completed now?
Time taken: highlight_green%2820%29 days