The greatest common factor would be 1 because it is the only one they have in common
From principle of floatation:
W = U
The volume of water displaced is as a result of the volume of object submerged.
The wood would also float with 1/4 of its total height or total volume below the water surface.
The answer is 7, your welcome if this helped!
Your unit cost will be $0.11 :)
The total area of the shape is 32