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A 12.5 m rectangular channel carries a discharge of 10 m3/s. What will be the critical velocity? (g = 10 m/s2)
  • a)
    2.5 m/s
  • b)
    2 m/s
  • c)
    3 m/s
  • d)
    4.75 m/s
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
A 12.5 m rectangular channel carries a discharge of 10 m3/s. What will...
q = Q/b = 10/12.5 = 0.8

Critical depth of flow (hc)= 0.4 m
Critical velocity = (ghc)1/2 = (10x0.4)1/2 = 2 m/s
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A 12.5 m rectangular channel carries a discharge of 10 m3/s. What will be the critical velocity? (g = 10 m/s2)a)2.5 m/sb)2 m/sc)3 m/sd)4.75 m/sCorrect answer is option 'B'. Can you explain this answer?
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