The wetted perimeter of the most economical trapezoidal section is 7.47m, the base width is 3m and has the side slope of 1H:2V.

The wetted perimeter of the most economical trapezoidal section is 7.

1.	The wetted perimeter of the most economical trapezoidal section is 7.47m, the base width is 3m and has the side slope of 1H:2V.
A.	1m
B.	2m
C.	3m
D.	4m
Answer» C. 3m

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The wetted perimeter of the most economical trapezoidal section is 7.47m, the base width is 3m and has the side slope of 1H:2V.

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