Average Velocity in a Circular Pipe
Easycontinuityvelocity
Water flows through a 0.20-m-diameter pipe at 0.060 m³/s. The average velocity is most nearly:
- A0.95 m/s
- B3.82 m/s
- C1.91 m/s
- D7.64 m/s
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Answer: C. 1.91 m/s
A = π(0.20)²/4 = 0.0314 m², so V = Q/A = 0.060/0.0314 = 1.91 m/s. Using πd² for the area gives 0.48 m/s, and using πr² with r = 0.10 m but d² gives 0.95 m/s.
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