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Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and 4 hours respectively. When both pipes and an outlet pipe ‘C’ are opened together, (2/5)th of the tank is filled in 48 minutes. Find the time required by pipe ‘C’ to empty the full tank.

A 10 hrs

B 12 hrs

C 18 hrs

D 24 hrs

E None of these

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