SOLUTION: All members of a crew work at the same pace. If only 4 of them are working, they complete a job in 27 days. How many days will it take all 9 members of the crew to complete this jo

Algebra ->  Rate-of-work-word-problems -> SOLUTION: All members of a crew work at the same pace. If only 4 of them are working, they complete a job in 27 days. How many days will it take all 9 members of the crew to complete this jo      Log On


   

Question 951162: All members of a crew work at the same pace. If only 4 of them are working, they complete a job in 27 days. How many days will it take all 9 members of the crew to complete this job?
Answer by josgarithmetic(39613) About Me  (Show Source):
You can put this solution on YOUR website!
r, one person rate
t, unknown time for second condition

system%284r%2A27=1%2C9r%2At=1%29

4r%2A27=9r%2At

4%2A27=9%2At

t=12