A rectangular channel section is most economical when the depth of flow and bottom width is in the ratio of ____________.

A rectangular channel section is most economical when the depth of flo

1.	A rectangular channel section is most economical when the depth of flow and bottom width is in the ratio of ____________.
A.	2 : 1
B.	1 : 1
C.	1 : 2
D.	1 : 4
Answer» D. 1 : 4

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A rectangular channel section is most economical when the depth of flow and bottom width is in the ratio of ____________.

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