SOLUTION: One pipe fills a storage pond in 20 hours. A second pipe fills the same pond in 15 hours. When a third pipe is added and all three are used at fill the pond, it takes only 6 hours.
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Question 31095This question is from textbook Prealgebra and Introductory Algebra
: One pipe fills a storage pond in 20 hours. A second pipe fills the same pond in 15 hours. When a third pipe is added and all three are used at fill the pond, it takes only 6 hours. Find how long it would take the third pipe alone to do the job.
This question is from textbook Prealgebra and Introductory Algebra
Answer by Paul(988) (Show Source): You can put this solution on YOUR website!
Let x be the time:
Equation:
Multply the whole equation by 60:
3x+4x+60=10x
7x+60=10x
3x=60
x=20
Hence, it would take the pipe 20 hours to do it alone.
Paul.
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