A spar buoy consists of a circular cylinder, which floats with its axis oriented vertically. One such buoy has a radius of 1.00 m, a height of 2.00 m and weighs 40.0 kN. What portion of it is submerged when it is floating in fresh water?
[A] 1.35 m
[B] 1.30 m
[C] 1.25 m
[D] 1.20 m
[E] 1.50 m
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