Intermediate Geometry : How to find the length of an edge of a prism
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Example Questions
Example Question #1 : Prisms
The volume of a prism is 
Given the length is 
The volume of a prism is length times width times height.
We are given the length is 7m and the width is 5m.
So, we plug these into our formula:
We then solve for height:
The height is therefore 6m.
Example Question #2 : Prisms
Find the missing edge of the prism when its volume is 
The goal is to find the height of the rectangular prism with the given information of its width and length. The volume of a rectangular prism is 
Because we're given the final volume and two of the three variables, we can substitute in the information we know and solve for the missing variable.
Therefore, the height of the prism is 
Example Question #3 : Prisms
A rectangular prism has a volume of 
If we let 
Since the volume of a rectangular prism is simply the product of width, length, and height, we get
We then simply solve for the width.
Therefore, our width is 3. Since our length is twice the width, the length is 6.
Example Question #4 : Prisms
A right, rectangular prism has a volume of 
None of the other answers.
The formula for the volume of a right, rectangular prism is 
Example Question #5 : Prisms
The surface area of a right rectangular prism is 
None of the other answers.
Use the formula for finding the surface area of a right, rectangular prism,
and substitute the known values, and then solve for w.
So,
So, the width is 7 cm.
Example Question #1 : How To Find The Length Of An Edge Of A Prism
The height of a retangular prism is three times its width; its length is twice its width. Its surface area is 1,078 square inches. Give the width of the box.
Since the length of the box is twice the width and the height is three times the width, 
The surface area of the box is
To find the width:
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