The hydraulic radius of an economical rectangular section is 4m, calcu – McqOptions

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1.	The hydraulic radius of an economical rectangular section is 4m, calculate the discharge through the channel if the bed slope of the channel is 1 in 1000 and manning s co efficient is 0.015.
A.	680m<sup>3</sup> s
B.	690m<sup>3</sup> s
C.	700m<sup>3</sup> s
D.	710 m<sup>3</sup> s
Answer» B. 690m<sup>3</sup> s

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