The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to

1/4 ‚àö√≥ (depth + breadth)

The most economical section of a trapezoidal channel is one which has

1.	The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to
A.	1/2 ‚àö√≥ depth
B.	1/2 ‚àö√≥ breadth
C.	1/2 ‚àö√≥ sloping side
D.	1/4 ‚àö√≥ (depth + breadth)
Answer» B. 1/2 ‚àö√≥ breadth