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Calculate the wetted perimeter of the most economical circular section having radius 3m in case of maximum discharge.

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+1 vote
in Fluid Mechanics by (118k points)
Calculate the wetted perimeter of the most economical circular section having radius 3m in case of maximum discharge.

(a) 15.12m

(b) 16.12m

(c) 17.12m

(d) 18.12m

This question was addressed to me during an online interview.

I would like to ask this question from Most Economic Circular Section topic in section Flow in Open Channels of Fluid Mechanics

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+2 votes
by (362k points)
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Best answer
The correct choice is (b) 16.12m

The explanation is: P = 2Rθ = 2(3)(2.6864) = 16.12m.

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