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A rectangular...

Question

A rectangular channel will be the most economical when the flow depth to bottom width is in the ratio:

A

1 : 1

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B

2 : 1

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C

1 : 2

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D

1 : 4

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Solution

The correct option is C $1 : 2$
Rectangular channel will be most economical

$(a) Depth of flow = \frac{B}{2}$
$(b) Hydraulic radius (R) = \frac{y}{2}$

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