Current Attempt in Progress

Rainwater flows through the galvanized iron downspout shown in the figure below at a rate of $\backslash (0\mathrm{.}005\backslash$mathrm$\{$~m$\}^\{3\}/\backslash$mathrm$\{$s$\}\backslash ).$ Determine the size of the downspout cross section if it is a circular and it is completely filled with water. Neglect the velocity of the water in the gutter at the free surface and the head loss associated with the elbow.

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$\backslash$mathrm$\{$m$\}$

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