SOLUTION: One pipe fills a pool in 30 min Another pipe fills a pool in 20 min Another in 10 min If all 3 were on how long till the pool is filled

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Question 342301: One pipe fills a pool in 30 min
Another pipe fills a pool in 20 min
Another in 10 min
If all 3 were on how long till the pool is filled

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
One pipe fills a pool in 30 min
Another pipe fills a pool in 20 min
Another in 10 min
If all 3 were on how long till the pool is filled
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The 1st fills 1/30 for the room per minute
The 2nd 1/20 per minute
The 3rd 1/10 per minute
Together, they fill 1/30 + 1/20 + 1/10 per min = 11/60 per minute
--> 60/11 minutes per room