A triangular channel (see Fig E10.6) is to be constructed of corrugated metal and will carry 8

Question:

A triangular channel (see Fig E10.6) is to be constructed of corrugated metal and will carry 8 m3/s on a slope of 0.005. The supply of sheet metal is limited, so the engineers want to minimize the channel surface. What is
(a) The best included angle θ for the channel;
(b) The normal depth for part (a); and
(c) the wetted perimeter for part (b)