Figure 3: Reservoir and pipe arrangement Problem 4 Water flows in the system shown in Figure 4. The pressure at A is measured as PA = 543 kPa (kN/m²). If the head loss between A and B is hy(A-B) = 3.5 m. a) Calculate the total flow rate in pipe 3 joining B-C [3 marks] b) Calculate the pressure at C. [3 marks] You may assume the friction factor, λ = 0.018 for all pipes, and the water density r = 1000 kg/m³. Ignore local losses at the pipe bends and junctions. L₁= 600 m, D. = 300 mm L 460 m, D, = 470 mm L=1200 m, D,= 500 mm C

Fig: 1