If two pipes function simultaneously, the reservoir is filled in 12 hrs.One pipe fills the reservoir 10 hours faster than the other.How many hours does the faster pipe take to fill the reservoir?

If two pipes function simultaneously, the reservoir is filled in 12

1.	If two pipes function simultaneously, the reservoir is filled in 12 hrs.One pipe fills the reservoir 10 hours faster than the other.How many hours does the faster pipe take to fill the reservoir?
A.	25hrs
B.	20hrs
C.	30hrs
D.	15hrs
Answer» C. 30hrs

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If two pipes function simultaneously, the reservoir is filled in 12 hrs.One pipe fills the reservoir 10 hours faster than the other.How many hours does the faster pipe take to fill the reservoir?

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