Reconsider Recitation Question, Now the duct length is doubled while its diameter is

maintained constant. If the total head loss is to remain constant, determine the drop in

the flow rate through the duct. $(D=0\mathrm{.}267m,$ Head Loss $=20m,$ Roughness

Height $=0\mathrm{.}007mm,v_{\text{a}\text{i}\text{r}}={1\mathrm{.}655}^{**}{10}^{-5}\frac{m^2}{s},{}_{\text{a}\text{i}\text{r}}=1\mathrm{.}145k\frac{g}{m^3})$