A most efficient trapezoidal section is required to give a maximum discharge of 21.5 m3/s of water. The slope of the channel bottom is 1in 2500. Taking C = 70 m1/2/s in Chezy equation. Which of the following are true
1
Normal depth of flow in section is 1.375 m
2
Value of manning’s coefficient of the channel is 0.015
3
Hydraulic radius is 2.75 m
4
Normal depth of flow is 2.75 m