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A boat is balanced by a 6

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A boat is balanced by a 6.5kN buoyant force having one sailor, three liquid-reservoirs of cylindrical cross-section and one Aluminum spherical-solid ball (2710 kg/m], 0.2m radius). The height and diameter of each reservoir is Im and 0.6m, respectively, while the weight of the sailor is 60 kg. Assume the empty boat weight 150 kg and the mass of empty reservoirs could be ignored.

(a) If each reservoir is 50% filled then, find the density of fluid

(b) What would happen if each reservoir is completely filled with a fluid (S. G = 11) but the buoyancy force remains the same.