A blower supplies standard air to a plenum that feeds two horizontal square sheet-metal
Chapter 6, Problem p6.114(choose chapter or problem)
A blower supplies standard air to a plenum that feeds two horizontal square sheet-metal ducts with sharp-edged entrances. One duct is 100 ft long, with a cross-section 6 in by 6 in. The second duct is 200 ft long. Each duct exhausts to the atmosphere. When the plenum pressure is 5.0 lbf/ft2 (gage) the volume fl ow in the longer duct is three times the fl ow in the shorter duct. Estimate both volume fl ows and the cross-section size of the longer duct.
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