Problem 159. A square based cuboid shaped metal con- tainer, whose mass is 13 kg, has a height of 6 dm, a base edge of 2 dm, and is half full of water. The container is laid on its side at the bottom of a cuboid shaped tank, whose base area is 20 dm? and in which the level of water is at a height of 4 dm. Find the total work that is required to stand the metal container upright on its square base.

Problem 159. A square based cuboid shaped metal con- tainer, whose mass is 13 kg, has a height of 6 dm, a base edge of 2 dm, and is half full of water. The container is laid on its side at the bottom of a cuboid shaped tank, whose base area is 20 dm? and in which the level of water is at a height of 4 dm. Find the total work that is required to stand the metal container upright on its square base.