A-Compute the pressure drop due to fitting through rectangular duct elbow (90) shown in the figure below its dimensions (175 x 350 mm) the elbow radius R = 350 mm. the air volume flow rate 0.5 m/s,, air density 1.2 kg/m and with necessity validation. 4.52 pa 5.19 pa 6.66 pa H=350 mm W= 175 mm C R/W H/W 0.25 0.5 0.75 1.0 1.5 2.0 0.5 1.5 1.4 1.3 1.2 1.1 1.0 0.75 0.57 0.52 0.48 0.44 0.40 0.39 1.0 0.27 0.25 0.23 0.21 0.19 0.18 1.5 0.22 0.20 0.19 0.17 0.15 0.14 R = 350 mm 2.0 0.20 0.18 0.16 0.15 0.14 0.13