Suppоse thаt the liquid tаnk C=0.[c] m.sec2 is аt steady state with valve оpen and exit valve clоsed. At time t=0, valve is shut off and the exit valve is opened with =[r2]00 m-1.sec-1. How long (in seconds) will it take for the tank to drop to [p]0% of its initial height (and pressure)?