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ExtremeBDS [4]
3 years ago
5

One pipe fills a storage pool in 20 hours, another pipe fills the same pool in 15 hours.

Mathematics
1 answer:
erica [24]3 years ago
6 0
X=time  of the third person it would take to fill the pool 
We can suggest this equation:
6[(1/20) + (1/15) +(1/x)]=1
6[(3x+4x+60)/60x]=1
(7x+60)/10x=1
7x+60=10x
7x-10x=-60
-3x=-60
x=-60/-3
x=20

Answer: the third person alone would fill the pool in 20 hours .
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