By calculating the areas of the rectangular bottom part, (LxW) , and then using pi to find the area of the top rounded part. (3.14 x Radius x Radius divided by 2) - if the rounded section is half a circle
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You need the area to find the volume of an object.
Mass = Pressure*Area
Pi x radius2 x height
There are basically two techniques for finding the area of a shape with uneven or irregularly shaped sides. If the sides can be described by algebraic equations, then integral calculus can be used to find the area. Failing that, you can approximate the irregular shape by fitting in a number of smaller, regularly shaped polygons such as squares and triangles, whose area can be calculated by simple geometric techniques.
you get a calculator and learn the correct formula
The answer depends on what information you do have about the object.
the volumn of water being displaced by the object as it pushes the water up equal to the volumn of the irrgulary shaped object. As long as such irrgulary shaped object doesn't absort the water such as sponge.
Take an amount of water of which you know the volume. Drop the object in the water. Find the difference
whats the object
Use the triple beam balance to find
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lenght x weight x height
water displacement
To find the area of a object you do width x highth for a rectangle. You multiply on side of the object 4 times to get the area of a square. To find the area of a trapizoid, the formula is, 1/2 times highth (base 1 plus base 2).
Displacement method.... Is the method to find volume of an irregular object
You need the area to find the volume of an object.