Question

Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and 9 hours, respectively. If pipe ‘C’ is opened along with pipes ‘A’ and ‘B’, then the tank gets filled in 9 hours. Find the time taken by pipe ‘C’ to empty (1/3)th part of the same tank.

A 5 hours
B 3 hours
C 2 hours
D 6 hours
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