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In the figure, the inlet and outlet are opened together on the empty tank. How long does it take to fill?

Competition practicePipes & Cisterns
  • A12 min
  • B6 min
  • C16 min
  • D32 min

Step-by-Step Solution

Net per minute → 12 min. (6 min counts the outlet as an inlet.)
Answer: A) 12 min

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