The volume of a cone can be obtained by increasing the volume of water.
The base area of the cone is (40/2)*(40/2)*π=400π.
The bottom area of glass is (80/2)*(80/2)*π= 1600π.
The volume of water rising, that is, the volume of the cone, is: (80/2)*(80/2)*π*3=4800π.
The height of the cone is 4800π/400π= 12.
It is meaningful to know that the original bottom of this cuboid is square.
Let the base length of a cuboid be x and the height be x-2.
The increased surface area is 4 sides with a height of 2, that is, 2 * x * 4 = 56 and x = 7.
So the height of the cuboid is 5.
So the volume of a cuboid is 7*7*5=245.