As shown inthe figure below, a multiduct cross section consists of seven2-cm-diamter smooth thin tubes packed tightly in a hexagonal"bundle" within a...

As shown inthe figure below, a multiduct cross section consists of seven2-cm-diamter smooth thin tubes packed tightly in a hexagonal“bundle” within a single 6-cm-diamter tube. Air, atabout 20°C and 1 atm, flows through this system at 150m3/h. Estimate the pressure drop per meter