Question progress: Enter depth $$ See hint

A trapezoidal channel carries discharge of $26\mathrm{.}12\frac{m^3}{s}.$ If slope of the bottom is $0\mathrm{.}000144,$ Manhing coefficient $n=0\mathrm{.}015,$ base width $6\mathrm{.}5m$ and the side slopes are $1$ vertical to $1\mathrm{.}3$ horizontal, determine the normal depth of flow.