6033. For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance). September 7, 2025 by Admin V/Vmax = (x/r)1/7 V/Vmax = (r/x)1/7 V/Vmax = (x.r)1/7 None of these ✅ The correct answer is option A.