Two inlet pipes A and B can fill an empty cistern in 22 and 33 hours r – McqOptions

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1.	Two inlet pipes A and B can fill an empty cistern in 22 and 33 hours respectively. They start work together but pipe A had to be closed 5.5 hours before the cistern was full. How many hour in all did it take the two pipes to fill the cistern?
A.	16
B.	16.5
C.	19.25
D.	16.2
Answer» C. 19.25

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