A $5\mathrm{.}9$ cm diameter horizontal pipe gradually narrows to $2\mathrm{.}9$ cm $.$ When water flows through this pipe at a certain rate, the gauge pressure in these two sections is $33\mathrm{.}5$ kPa and $23\mathrm{.}6$ kPa $,$ respectively.

Part A

What is the volume rate of flow?

Express your answer to two significant figures and include the appropriate units.

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