1.69: Diagram accurately draw

the Figure of symmetry cone is shows below vertical. a water such A tank diameter that in the of shape the circular of a hollow rim of right the circular cone is cone The fixed vertex, with its axis of

Initially, At the time water the seconds in the tank tank is after empty above the and water is water starts metres. flows to flow into into the the tank tank, at a the constant height rate of the of 0.03 m3/s. surface of

water Find, in above m/s to at significant the instant when figures, the rate of change of the height of the surface of the