Mathematics · Pipes and Cisterns

Pipes A and B can fill an empty cistern in 13 minutes and 39 minutes, respectively. Both Pipe A and Pipe B are opened together. After how much time should Pipe A be turned off so that the empty cistern is completely filled in a total of 27 minutes?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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4 min

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