determine: (i) The dimensions of the section if it is most economical.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Determine the dimensions of the most economical trapezoidal earth-lined channel (Manning’s N = 0.020) to carry 14 m3/s at a slope of 1 in 210. A trapezoidal channel has side slopes of 1 horizontal to 2 vertical and the slope of the bed is 1 in 1500. The area of the section is 40 m2. If Chezy’s constant C = 60, determine: (i) The dimensions of the section if it is most economical.
a.
b = 0.9 m; y = 1.085 m
b.
b = 1.154 m; y = 0.577 m
c.
b=2.828 m , y= 1.414 m
d.
b = 5.93 m; y = 4.8 m
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