It is pretty simple to find out the volume of a solid shape But do you ever wonder how to get the volume of irregular objects, such as a rock? How will you be able to figure out the volume of that? Well, there's a technique called the "displacement technique" that will help you find the volume of an irregular object. 
     When we performed this concept in science class, we started by estimating the volume of that object. Then, we filled a graduated cylinder with water. Then we wrote down the original volume of the water. We placed the object into the cylinder, and the volume of the water should increased (but it didn't always.) The last step was to subtract the volume of the water before the object was put in it from the the volume with the object in it. That is how we got the volume of an  irregular object. 
 





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