$2.)$ Determine the flow rate in a trapezoidal riprap lined channel assuming uniform fli

Flow depth $=1\mathrm{.}94$

Manning's coefficient $n=0\mathrm{.}04$

Channel bottom width $=2\mathrm{.}9m$

Channel bottom slope $S=0\mathrm{.}005$

Channel side slope $=2$:$1(H$:$V)$

So the discharge is $Q=$