Two dimensionally identical containers are connected to each other by a pipe with a diameter of \(3 \mathrm{~cm}\). Container \(A\) initially contains water but container \(B\) is empty. The crosssectional area of each container is \(4 \mathrm{~m}^{2}\). If the viscous effects are negligible, determine the time needed to empty the container \(A\) completely.

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A 0.7 m 2.5 m B 0.5 m