Problem: A rectangular channel is $2\mathrm{.}5$ m wide and has a uniform bed

slope of $1$ in $500.$ If the depth of flow is constant at $1\mathrm{.}7$ m calculate $($a$)$ the

hydraulic mean depth, $($b$)$ the velocity of flow, $($c$)$ the volume rate of

flow. Assume that the value of the coefficient $C$ in Chezy's formula is $50.$