A multi manometer is open to air on both sides, find the reading of h4. Take the density of water as 1000 kg/m. hl=175 cm, h2 = 120 cm, h3= 90 cm, h5 =80 cm, h6=140 cm, h7 =250 cm. Fluid 1 SG = 1 Fluid 2 SG = 1.3 Fluid 3 SG = 13.6 Fluid 4 SG = 0.8 Fluid 5 SG = 2.1 Fluid 6 SG = 0.7 Fluid 7 SG = 4.3