SOLUTION: In a small nursery, Becky can water all the plants in 30 minutes. Her co-worker, Karen, can water all the plants in 20 minutes. How long will it take them working together to water

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Question 270820: In a small nursery, Becky can water all the plants in 30 minutes. Her co-worker, Karen, can water all the plants in 20 minutes. How long will it take them working together to water the plants?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
20*30/(20+30)=600/50=12 minutes will do it working together.