Water flows in a $1\mathrm{.}7$ m wide rectangular channel. If the vertical depth is $1\mathrm{.}2$ m and $u_{\text{m}\text{a}\text{x}}$ is $1\mathrm{.}9\frac{m}{s},$ find the discharge in the channel. The angle $$ is $25.[10]$

Hint: Velocity and the area must be normal. Find $h$ for the vertical depth given.