Problem $4\mathrm{.}16$

A circular storm sewer must carry $230f\frac{t^3}{s}$ and uniform, gravity flow is assumed. The pipe will have a slope of $0\mathrm{.}044f\frac{t}{f}t$ and is made of reinforced concrete. Recommend a nominal pipe size to carry the flow. Nominal pipe sizes include; $18,24,30,36,42,48,54,60,66$ and $72$ inches. Standard concrete pipe, use n$=0\mathrm{.}013($Table $4\mathrm{.}3).$