Find the best hydraulic section for a rectangular section with cross-sectional area of 12 . A concrete-lined canal having one side vertical and other side is sloping at 2: 1 carries a discharge of 10...

Find the best hydraulic section for a rectangular section with cross-sectional area of 12
.

A concrete-lined canal having one side vertical and other side is sloping at 2: 1 carries a discharge of 10
 Is with velocity of 0.715 m/s. Determine the dimensions of the canal and the bed slope for minimum cost of construction if the cost of excavation is 2.0 $/ and the cost oflining is 6.0 $/ ( = 0.014).