SOLUTION: A group of 3 workers need 20 days to do a certain job. How long would it take a group of 4 workers to do the same job, if each worker performs at the same rate?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: A group of 3 workers need 20 days to do a certain job. How long would it take a group of 4 workers to do the same job, if each worker performs at the same rate?      Log On


   

Question 976111: A group of 3 workers need 20 days to do a certain job. How long would it take a group of 4 workers to do the same job, if each worker performs at the same rate?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
RT=J to relate rate, time, job.

r, rate for one worker

Let t be the time for the group of four workers to do the same job.
system%283r%2A20=1%2C4r%2At=1%29