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Question

An inlet pipe can fill a tank in 18 minutes, while an outlet pipe can empty it in 27 minutes. Sujata starts the inlet pipe at 6
a.m., but the outlet pipe is accidentally opened at the same time. She notices the mistake at 6:15
a.m. and closes the outlet pipe. At what time will the tank be completely filled?

A 6:18 a.m.

B 6:28 a.m.

C 6:22 a.m.

D 6:32 a.m.

E none

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