Pipes A and B can empty a full tank in 8 and 12 hours, respectively. C is a filling pipe. All the three pipes were opened together at the same time and one-sixth of the tank got emptied in one hour. C alone can fill the tank in:

Pipes A and B can empty a full tank in 8 and 12 hours, respectively. C

1.	Pipes A and B can empty a full tank in 8 and 12 hours, respectively. C is a filling pipe. All the three pipes were opened together at the same time and one-sixth of the tank got emptied in one hour. C alone can fill the tank in:
A.	20 hours
B.	30 hours
C.	24 hours
D.	25 hours
Answer» D. 25 hours

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Pipes A and B can empty a full tank in 8 and 12 hours, respectively. C is a filling pipe. All the three pipes were opened together at the same time and one-sixth of the tank got emptied in one hour. C alone can fill the tank in:

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