Buoyancy: A barge is 10 m wide and 60 m long and has vertical sides. The bottom of the boat is 1.2 m below the water surface. What is the weight of the barge and its cargo, if it is floating in fresh water of density 1000 kg/m3?
A. 3.5 MN
B. 6.4 MN
C. 6.8 MN
D. 7.1 MN
E. 9.5 MN
Answer: D
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