SOLUTION: If person A takes 20 hours to complete the work and person B takes 30 hours to complete the same work, together in how much time the work will get done?

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Question 849924: If person A takes 20 hours to complete the work and person B takes 30 hours to complete the same work, together in how much time the work will get done?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
1/20+1/30=1/x
3/60+2/60=1/x
5/60=1/x
1/12=1/x
x=12