Discussion :: Irrigation - Section 3 (Q.No.1)
|Narender Kumar said: (Feb 27, 2017)|
|l think the option D is the right.
m = d/4 in circular.
|Shiva said: (Sep 23, 2017)|
|Correct answer is D/4.|
|Nayan Ahir said: (Dec 12, 2017)|
|It's for diameter. In this case, the radius is D.|
|Partho Kole said: (Mar 15, 2018)|
|D/2 is the right answer here.
In this question, the radius is indicated by 'D', so don't take it as a diameter. Hydraulic mean radius is defined by the ratio of Area by the perimeter, if you put the right relation in between, you will definitely see the answer comes to D/2.
|Dhananjay said: (Mar 3, 2019)|
|Yes, you are Right @Partho.|
|Kajal Tomar said: (Oct 16, 2019)|
|Actually it is irrigation canal having triangular sides and circular bottom and for such canal:-
A = D"2 ( @ + cot@ )...........(1).
P = 2D ( @ + cot@ )..................(2).
therefore R = A/P = (1)/(2) = D/2.
So option B is correct
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