HomeEngineeringThe hydraulic diameter of an annulus of inner and outer radii Ri and Ro respectively is 6192. The hydraulic diameter of an annulus of inner and outer radii Ri and Ro respectively isBy Admin / September 7, 2025 4(Ro-Ri) √(Ro-Ri) 2(Ro-Ri) Ro + Ri ✅ The correct answer is option C.
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