Engineering Board Exam Reviewer · Fluid Mechanics · medium
A rectangular channel 2 m wide flows 1 m deep with n = 0.015 and S = 0.0004. What is the mean velocity using Manning's formula?
- 0.840 m/s
- 1.333 m/s
- 0.013 m/s
- 1.680 m/s
Answer
A. 0.840 m/s
Solution
R = A/P = 2/4 = 0.5 m. V = (1/0.015)(0.5)2/3(0.02) = 0.840 m/s.
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