Empty the vessel

A cylindrical vessel with radius 90 cm90 \text{ cm} filled with 3-meter deep water is sitting on a tower, as shown in the diagram. The vessel has a hole on the bottom with a cross-sectional area of 6.3 cm26.3 \text{ cm}^2.

How long (in minutes) will it take before the vessel is completely drained through the hole?

Assume that the gravitational acceleration is g=9.8 m/s2.g = 9.8 \text{ m/s}^2.

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