SOLUTION: A company has two large computers. The slower computer can send all the companies emails in 30 mins. The faster computer can complete the same job in 10 minutes. If both computers

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Question 1140365: A company has two large computers. The slower computer can send all the companies emails in 30 mins. The faster computer can complete the same job in 10 minutes. If both computers are working together, how long will it take to do the job?
Found 2 solutions by josmiceli, dkppathak:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Add their rates of working and
let+t+ = their time working together
+1%2F30+%2B+1%2F10+=+1%2Ft+
Multiply both sides by +30t+
+t+%2B+3t+=+30+
+4t+=+30+
+t+=+7.5+
It takes 7 min 30 sec with both working

Answer by dkppathak(439) About Me  (Show Source):
You can put this solution on YOUR website!
A company has two large computers. The slower computer can send all the companies emails in 30 mins. The faster computer can complete the same job in 10 minutes. If both computers are working together, how long will it take to do the job?
one can send all mail in 30 minutes
it will take for 1 mail=1/30 minutes
other will take send all mail=10 minutes
this will take in 1 mail =1/10 minutes
both will take for for 1 mail=1/10+1/30=4/30 minutes
both working together it will take total time =30/4=7.5 minutes