A floating MODU displacing 20,000 long tons with a VCG of 50 feet loads 100 long tons at 100 feet above the baseline and 200 long tons at 130 feet above the baseline. What is the new KG?

Correct Answer: Option C — 51.0 feet

Final vertical center of gravity (KG) is determined by taking the sum of vertical moments divided by total final displacement. Initial moment is 20,000 * 50; add moments for 100 LT at 100 feet and 200 LT at 130 feet, dividing by 20,300 LT to yield 51.0 feet.