5. The figure below shows two DN 150 Schedule 40 pipes inside a rectangular duct. Each pipe carries 450 L/min of water at 20°C, and benzene at 70°C (sg = 0.862, n = 3.5 × 10-4 Pa‍s) flows inside the duct. The two fluids have the same Reynolds number. Compute the pressure difference for the benzene flow between two points 3.80 m apart if the duct is horizontal. Use the roughness for steel pipe for all surfaces. (20 points) DN 150 Schedule 40 pipes 400 mm + 200 mm