Two pipes P, Q can fill a cistern in 12 and 15 minutes separately. P i – McqOptions

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1.	Two pipes P, Q can fill a cistern in 12 and 15 minutes separately. P is open for 4 minutes and turned off. In how much time will the remaining part be filled by Q?
A.	11 minutes
B.	9 minutes
C.	12 minutes
D.	10 minutes
Answer» E.

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