A barge of 120.0 ft. length, 20.0 ft. width, and 15.0 ft. height is to be built. Discuss the use of fiberglass versus ferrocement as the building material and comment on the differences of physical...

A barge of 120.0 ft. length, 20.0 ft. width, and 15.0 ft. height is to be built. Discuss the use of fiberglass versus ferrocement as the building material and comment on the differences of physical characteristics. Determine the underwater weight of a steel tubular member, 0.60 m in diameter (outer) and 10.0 m in length and having a thickness of 0.02 m, that is to be used in the underwater portion of a drilling rig. In order to reduce its underwater weight, a syntactic foam cylinder is added to the outside of this tubular member. Compute the thickness of this foam cylinder if the underwater weight of the tubular member is to be reduced by 25%.