A box caisson, 10 m high, is 18 m × 9 m at the base. The weight of the caisson is 9 MN and its centre of gravity is 4.2 m above the base. Check whether the Caisson is stable.
If it is not, suggest how it can be made stable. Suppose the unit weight of the water at the site is 10.2 kN/m3.