SOLUTION: How many 2 foot wide by 2 foot long by 6 inch thick granite slabs would be needed to build a 77 foot wide by 77 foot by 28 feet high pyramid? Thank you for your time!

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Question 1104613: How many 2 foot wide by 2 foot long by 6 inch thick granite slabs would be needed to build a 77 foot wide by 77 foot by 28 feet high pyramid? Thank you for your time!
Found 2 solutions by dbrooks1979, greenestamps:
Answer by dbrooks1979(1) About Me  (Show Source):
You can put this solution on YOUR website!
77ft wide x 77ft long x 28ft high = 166012
2ft wide x 2ft long x .5ft = 2
166012/2=83006 slabs

Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


The calculations by the other tutor indicate that he is building a box shaped figure with a square base, not a pyramid with a square base.
The volume of his box shape is 77%2A77%2A28+=+166012.
The volume of a pyramid with a square base 77 feet on a side and 28 feet high is %281%2F3%29%2A77%2A77%2A28+=+166012%2F3+=+55337.333

Since each block is 2 cubic feet (2x2x0.5), the number of blocks you need is APPROXIMATELY 55337.333%2F2+=+27669.

But, in fact, you can't exactly build the pyramid with rectangular blocks; so that answer is only an approximation.