SOLUTION: Working together, it takes two computers 20 minutes to send out a company's email. If it takes the slower computer 45 minutes to do the job on its own, how long will it take the fa

Algebra ->  Rate-of-work-word-problems -> SOLUTION: Working together, it takes two computers 20 minutes to send out a company's email. If it takes the slower computer 45 minutes to do the job on its own, how long will it take the fa      Log On


   

Question 1129107: Working together, it takes two computers 20 minutes to send out a company's email. If it takes the slower computer 45 minutes to do the job on its own, how long will it take the faster computer to do the job on its own?
Answer by greenestamps(13198) About Me  (Show Source):
You can put this solution on YOUR website!


The two computers together do 1/20 of the job each minute; the slower computer does 1/45 of the job each minute. So the fraction of the job done by the faster computer each minute is

1%2F20-1%2F45+=+9%2F180-4%2F180+=+5%2F180+=+1%2F36

So the time required for the faster computer to do the job alone is 36 minutes.