To fill a cistern pipes A, B and C take 20 minutes, 15 minutes and 12 – McqOptions

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1.	To fill a cistern pipes A, B and C take 20 minutes, 15 minutes and 12 minutes respectively. The time in minutes that the three pipes together will together will take to fill the cistern, is ?
A.	7 hrs
B.	8 hrs
C.	8 hrs 30 min
D.	5 hrs
Answer» E.

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