A rectangular cross section tank 150mm x150mm is initially at study state with inlet liquid flow rate 200LPH and liquid level 5cm. the tank has linear resistance in the outlet pipeline. If input flow rate is suddenly changed to 300LPH. find transfer function of the tank and also: (i) Find the new study state level of liquid level in the tank at flow rate of 300LPH. (ii) Find time required for 90% response (iii) Find the time taken by the level to reach 60mm.