SOLUTION: My son needs to build a 3D shape ie a cuboid with a surface area of 180cm2. How does he work out what the lenght,height and width should be. Many thanks George

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Question 328687: My son needs to build a 3D shape ie a cuboid with a surface area of 180cm2. How does he work out what the lenght,height and width should be.
Many thanks
George
Answer by rapaljer(4671)   (Show Source): You can put this solution on YOUR website!
If the total surface area is 180 cm^2, then divide by 6 because there are a total of 6 faces on a cube. This gives you 30 cm^2 per face.

Let x = length of each side of each face. Then x^2 = 30, so x = . This is approximately 5.48 cm for each edge of the cube.

I have a page with several topics on Geometry and Geometric Measures on my website that may be helpful to you. To see this website, click on my tutor name "rapaljer" anywhere in algebra.com. Click on my website name that you will see there, and look near the bottom of my Homepage for "Topics from Geometry." These are my own explanations that are written especially for students who have trouble with math!


Dr. Robert J. Rapalje, Retired
Seminole State College of Florida
Altamonte Springs Campus
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