MCQOPTIONS
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				| 1. | 
                                    The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to | 
                            
| A. | Half the depth | 
| B. | Half the breadth | 
| C. | Twice the depth | 
| D. | Twice the breadth | 
| Answer» B. Half the breadth | |