Problem $3$

Design concrete sewer pipes for the storm sewer along maple Ave., between $8$ th and $7\text{'}$ street $($CB$-1$ to CB$-2)$ and $7$ in and Gi street $($CB$-2$ to CB$-3)$ as shown on the storm sewer layout map below. The return period for the design is $10-$year storm. The Manning roughness coefficient for the concrete pipe is $0\mathrm{.}013.$ The ground elevation and scale are given in ft in the layout map below. Assume all runoff from sub$-$basin $1($SB$-1)$ flows into catch basin $1($CB$-1).$ Similarly, all runoff from sub$-$basin $2($SB$-2)$ flows into catch basin $2($CB$-2).$

$\backslash$table$[[$Sub$-$basin a$,$Area $(*$

Can you please help me solve this question there is some math involved in it and this is not an exam question its homework problem