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## Homework Statement

In the image uploaded below, a boxed shaped object is shown. It is floating in water so the forces that act on it are buoyancy and gravity. The first and the last compartments are filled with evenly distributed weight. The middle 2 compartments are empty.

Specifics are:

Lenght of total box: 20m

Lenght of each compartment: 5m

Weight of empty comp: 20t

Weight of 10t evenly distributed at conpartments by 2t/m

My question here is how were the diagrams posted below drawn? I don't understand the bottom one at all.

http://postimg.org/image/9q6xrouer/

## Homework Equations

3. The Attempt at a Solution [/B]