Four pipes can fill a reservoir in 15, 20, 30 and 60 hours respectivel – McqOptions

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1.	Four pipes can fill a reservoir in 15, 20, 30 and 60 hours respectively. The first one was opened at 6 AM, second at 7 AM, third at 8 AM and the fourth at 9 AM. When will the reservoir be filled ?
A.	11 AM
B.	12 Noon
C.	1 PM
D.	1:30 PM
Answer» D. 1:30 PM

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