+1 vote
in Fluid Mechanics by (118k points)
Let the top width of a rectangular channel be B and the depth be y, determine the hydraulic radius of the channel.

(a) By/ B+2y

(b) By/ B+ y

(c) y

(d) B

I had been asked this question at a job interview.

This interesting question is from Geometrical Properties of Rectangular Section in portion Flow in Open Channels of Fluid Mechanics

1 Answer

+1 vote
by (362k points)
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Best answer
The correct answer is (a) By/ B+2y

Easy explanation: Hydraulic Radius(R) = A/P

R = (B)(y)/ B + 2y.

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