If the body is a solid not soluble in water then we can keep it immersed in a measurable jar. Just noting down the level of water raised and getting the difference in the level with the initial one, we can get the volume of the irregular shaped object.
First you need to get a graduaded cylinder and then you need to fill it up enough to submerge the entire object then you drop the object into the water and you look how much the water level rised and that is the volume of the object.
Drop the object into a graduated cylinder 50 mL half full of water and find the difference in volume. If it is too big for a measuring cylinder then make a small hole in the side of a plastic container, fill with water to this hole, drop the object in and collect the run off. Measure the volume of the run off.
The answer depends on what information you do have about the object.
Take an amount of water of which you know the volume. Drop the object in the water. Find the difference
It is used to find the volume of an irregularly shaped object. An object dropped into a volume of water will displace an equal volume of water.
Use volume displacement method.
Displacement method.... Is the method to find volume of an irregular object
When you are trying to find the volume of an irregularly shaped object.
Make a mold of the object and then fill the mold with water and measure the volume of the water.
lenght x weight x height
water displacement
Volume is the amount of cubic centimeters in an object. To find the volume of a regular shaped object multiply length x width x height. To find an irregular shaped objects volume put water in a container and measure the amount. Place the object in the water and measure the new volume. Subtract the old volume from the new volume and that's your answer. You would write as x cm3. Weight is gravity's pull on an object