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  1. A tap can fill a tank in 16 minutes and another can empty it in 8 minutes. If the tank is already  full and both the taps are opened together will the tank be filled or emptied? How long will it take before the tank is either filled completely or emptied completely as the case may be?

Options:
A .  Empties  , 6 min.
B .  Filled , 6 min
C .  Empties  , 8 min.
D .  Filled , 6 min
Answer: Option C

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