4 a) b) c) An inverted conical container in the following Figure is filled with water to a height of 12 cm at time, t=0. Water leaves the container at a rate of dv where V is the volume of water in cm. dt = -3t cm/s, 60 12 cm Determine the volume of water in the container at time t = 0 Determine the volume of water in the container at time t seconds How long does it take to empty the container? 3 marks 4 marks 2 marks