Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 14 (Q.No. 21)
21.
In a circular sewer of diameter D, if the depth of flow is D/4, what is the wetted perimeter equal to ?
πD/4
πD/2
πD/3
D/3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
3 comments Page 1 of 1.

Priyanka said:   5 years ago
d/D = 1/2(1-cosa/2)
Cosa/2 =1/2
a=120*
p= pi * D *a /360
p = pi *D/3
(1)

Amith said:   7 years ago
As per my knowledge, it is 2rθ.

Dolly said:   7 years ago
How? explain please.

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