6621. Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f₁ and that for smooth pipe is f₂. Pick out the correct statement. September 7, 2025 by Admin f₁ = f₂ f₁ < f₂ f₁ > f₂ Data not sufficient to relate f₁ & f₂ ✅ The correct answer is option C.
