A solid with a square base of edge 11 cm and volume of 1573 cm3 was placed in a tank with its base touching the base of the tank.

The volume of the water in the tank is 80 by 60 by 23

The water level in the tank was 23 cm. The tap attached to the tank was turned on and water flowed out at a rate of 3 litre per minute.

A) How long does it take for the water level just to reach the top of the solid?

B) The tap was then turned off. What will the height of the water level be when the solid was then removed from the tank? (Give your answer correct to 2 decimal places.)

Source: Maha Bodhi