What does density of a ship's cargo have to do with the volume of the cargo the ship can carry?
The Cargo must weigh less than the ship, and although heavy, ships are less dense than water.
A cargo ship is any vessel which is primarily used to carry cargo, goods or raw materials from port to port. There are an enormous variety of cargo ships in all shapes and sizes. They can be divided into the following categories. General cargo vessels, tankers, container ships, dry bulk carriers, mutlipurpose ships and reefers (for frozen cargo).
It actually depends on witch viking ship you are asking about the viking long ships were built for speed and had to be maneuverable enough that they could just pull in at land and not have to tie the boats up these ships would carry up to 28 men but couldn't carry much cargo but the viking merchant ships were built mainly for carrying large amounts of cargo that could way up to 4 tons…