An oil tanker can carry 0.5 x 10 kg of oil of relative density 0.85. The ship can be considered as being of rectangular shape, with length 380 m and width 55 m. The mass of the ship is 190 x 10 kg. Calculate the draught of the fully loaded ship in seawater. (An- 1025 kg/m, the 'draught of a vessel is the depth to which it is immersed in the water). [ 32.21 m) When the ship is unloaded, it is necessary to carry seawater ballast in order to keep the propeller submerged. A minimum draught of 20 m must be maintained. What volume of seawater must be added to meet this requirement, and what fraction of the ship's capacity will be filled with seawater ballast? [2326 x 10 m, 39.5% 1