SOLUTION: The flowerpot has a square base 12 in. at the bottom and 18 in. at the top has a uniform thickness of 3 in. and is 1ft. high. find the amount of material necessary to construct 100

Question 1058286: The flowerpot has a square base 12 in. at the bottom and 18 in. at the top has a uniform thickness of 3 in. and is 1ft. high. find the amount of material necessary to construct 1000 such pots. (Neglect the drain in the bottom)

PLS HELP...thx
Found 2 solutions by ikleyn, blaser211:
Answer by ikleyn(52864)   (Show Source): You can put this solution on YOUR website!
.
This 3D solid body (solid shape) is called "pyramidal frustum", or "a frustum of pyramid".

See the lesson
    - Finding pyramidal frustum volume
in this site on finding the volume of a pyramidal frustum.

You have this free of charge online textbook on Geometry
    - GEOMETRY - YOUR ONLINE TEXTBOOK
in this site.

The referred lesson is the part of this textbook under the topic "Miscellaneous advanced Geometry problems".

Answer by blaser211(6)   (Show Source): You can put this solution on YOUR website!
this is the annswer that i got is 1145 5/8ft^3. but in our book it says that the answer should be 1098.0 ft^3.
pls pls help
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