Aship has a length of 150 m and wetted area of 3000 m2. a model of this ship 5m in a ship has a length of 150 m and wetted area of 3000 m2. a model of this ship 5m in surface has skin resistance of 49.05 n/m2 at a velocity of 3 m/s and the velocity index is 1.85. the corresponding values for the model surface towed in fresh water are respectively 16.38 n/m2, 3m/s and 1.90. calculate : (i) the corresponding speed of ship (ii) the shaft power required to propel the ship at this speed through sea water (p =1030 kg/m3). take the propeller efficiency as 75%.