This is done via a process called integration. In principle, you divide the solid into thin flat slices, calculate the volume of each (thickness x area), and add everything up. If the slices are themselves irregular, you divide them up into thin strips, calculate the volume of each, and add up.
LxWxH
The formula for a rectangular solid is to multiply the measurements of Length(L), Width(W) and Height(H). Ex: L x W x H = Volume
You use a graduated cylinder to measure the volume of the rock with the water and the water without the rock
If you have a ruler then you could measure the length width and height and then multiply them together. (LWH is the formula)
what is the surface area and volume of each solid below
There is no formula for finding the volume of an irregular solid. One method is water displacement which works as follows: Fill a graduated container with water and read off the volume of water. Then you submerge the irregular shaped solid in the water and measure the volume inside the container again. The difference between the two levels is the volume of the solid. This clearly cannot work for solids that are soluble in water. Other fluids may have to be used in such cases. Also, it will not work if the solid floats on water, but in that case you can submerge it using additional weights (whose volume you have measured).
ask the gods
There kind of solid object will determine the formula that will be used to find its volume.
Irregular solid volume is still measured in cm3 etcTo Find the Volume of an irregular object you can,Measure out a proportional amount of water to the object you are finding the volume ofPut the object in the container of waterSee how much the water has risen byYou now have the volume!!(The difference between the new and old volumes of water is the volume
So that the irregular solid isn't wet when you place it on the balance, since that would make it appear to have a greater mass than it actually does.
length x width x height
LxWxH
graduated cylindergraduated cylinderSubmerge your solid in a liquid the liquid volume displaced is equal to your irregular solid volume.
The water displacement method is typically used to find the volume of an irregular solid. The object is submerged in a known amount of water, and the increase in water volume is measured. This increase in volume is equal to the volume of the irregular solid.
It's simple, you just have to take a measurable recipient big enough to contain the solid, fill the recipient with a known volume of water and drop the irregular solid into the water. Then you can measure the increase of volume, which will be equivalent to the volume of your solid.
You place it in water to see the volume of water it displaces. Fill a large, graduated measuring cylinder to about halfway with water (say to 50mL) Put the irregular solid in, and measure the volume it reads (solid + water). (say it reads 80mL) So the volume of the irregular solid will be: volume(solid+water) - volume(water). For example, the volume of the water was 50mL, and when the solid was added, the volume increased to 80mL. The volume of the solid would be 80mL - 50mL. So it would be 30mL.
You can dip the irregular solid in a water or other suitable liquid. This is how, you can measure the volume of the solid. The mass can be measured by weighing scale. Mass/volume = density. It is easy to measure the mass and volume of the liquid. First measure the mass the container. Then add the liquid to it. You will get the mass of the liquid. Then measure the volume of the liquid. Use the above formula to calculate the density of the liquid.