Three taps A, B and C can fill a tank in 10, 12 and 15 hours respectiv – McqOptions

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1.	Three taps A, B and C can fill a tank in 10, 12 and 15 hours respectively. How long (in hours) would the three taps take to fill the tank if all of them are opened together?
A.	4
B.	8
C.	6
D.	7
Answer» B. 8

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