SSC JE Civil Engineering 30-Oct-2020 Shift 1 Paper

Question : 125 of 200

Marks: +1, -0

For obtaining the most economical trapezoidal channel section with depth of flow = 3 m, what is the hydraulic mean radius ?

Solution:

Most economical section is the one whose wetted perimeter is minimum for the given value of discharge.

Hydraulic mean radius,

{\y}_{{\m}}={{\y}_{0}}/{2}={3}/{2}=1.5 {\m}

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