एक प्राकृतिक नदी 2500 क्यूमेक प्रवाह वहन करती है। नदी के अनुप्रस्थ काट की अपेक्षित गीली परिधि क्या है?

This question was previously asked in
BPSC AE Paper 6 (Civil) 25 March 2022 Official Paper
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  1. 23.75 m
  2. 2375 m
  3. 237.5 m
  4. 327.5 m

Answer (Detailed Solution Below)

Option 3 : 237.5 m
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Detailed Solution

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स्पष्टीकरण:

लेसी के सिद्धांत के अनुसार, निम्नलिखित सूत्र नीचे दिए गए हैं:

  1. द्रवचालित माध्य गहराई, \(R = \frac{5}{2}\frac{{{V^2}}}{f}\)
  2. चैनल अनुभाग का क्षेत्रफल, \(A = \frac{Q}{V}\)
  3. गीली परिधि, \(P = 4.75\sqrt Q \)
  4. रिजीम माध्य वेग  \(V = {\left( {\frac{{Q{f^2}}}{{140}}} \right)^{1/6}}\)
  5. बिस्तर ढलान, \(S = \frac{{{f^{5/3}}}}{{3340{Q^{1/6}}}}\)

गणना:

Q = 2500 cumec

\(P = 4.75\sqrt Q =4.75\sqrt {2500}\)  = 237.5 m

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