The hydraulic radius for flow in a rectangular duct of cross-sectional

1.	The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is
A.	‚Äö√ √∂(HW/≈ì√Ñ)
B.	HW/2(H + W)¬¨‚â§
C.	HW/4(H + W)¬¨‚â§
D.	2HW/(H + W)¬¨‚â§
Answer» C. HW/4(H + W)¬¨‚â§

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The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is

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