Question $3.$

In the sewer passage given below;

a$)$ Calculate the design flow rate of each pipe.

b$)$ Design the system and determine the dimensions of all pipes.

$q=0\mathrm{.}015\frac{L}{s}\frac{?}{m},k=2,h{d}_{\text{m}\text{i}\text{n}}=1\mathrm{.}5,h{d}_{\text{m}\text{a}\text{x}}=4m,V_{\text{m}\text{i}\text{n}}=0\mathrm{.}5\frac{m}{s},V_{\text{m}\text{a}\text{x}}=2\mathrm{.}5\frac{m}{s},\frac{h}{D_{\text{m}\text{i}\text{n}}}=65\%,$

$\frac{h}{D_{\text{m}\text{a}\text{x}}}=65\%,J_{\text{m}\text{i}\text{n}}=0\mathrm{.}002,n=0\mathrm{.}015.$