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Q4) A ship of displacement 7700 tonne in sea water of density 1025 kg/m³ has a breadth of 20 m and a draught of 6.6 m.

The area of waterplane is 1800 m², KB is 3.6 m, KG is 4.5 m and the second moment of area of the waterplane about the centreline is 25000 m4.

A rectangular wing tank of length 10 m and breadth 6 m is situated above a double bottom of depth 1.4 m as shown in Fig Q4.

Calculate the angle of heel that would occur if the wing tank is bilged. (16)