1. A coagulation tank receives a flow of 0.168 m3/s at 5oC with the following conditions: 1. Tank configurations: cubic shape 2. Detention time=5s 3. Velocity gradient=700 s-1 4. Impeller type: turbine, 6 flat blades, Np=5.7 5. Available impeller diameters: 0.45, 0.6 and 1.2 m 6. B=1/3H Determine the following: 1. Number of tanks 2. Water power input (kW) 3. Tank dimensions in m 4. Diameter of the impeller in m 5. Rotational speed of impeller in rpm