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Calculate the side slope of a trapezoidal channel section having base 8m, depth 4m and the hydraulic radius is 2.36m.

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+1 vote
in Fluid Mechanics by (118k points)
Calculate the side slope of a trapezoidal channel section having base 8m, depth 4m and the hydraulic radius is 2.36m.

(a) 1⁄6

(b) 1⁄3

(c) 1⁄2

(d) 1⁄4

I got this question in a job interview.

This is a very interesting question from Geometrical Properties of Trapezoidal Section in chapter Flow in Open Channels of Fluid Mechanics

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+2 votes
by (362k points)
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Best answer
Correct option is (c) 1⁄2

For explanation I would say: Hydraulic Radius(R) = A/P

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