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!

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) (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) (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 .
The volume of a pyramid with a square base 77 feet on a side and 28 feet high is

Since each block is 2 cubic feet (2x2x0.5), the number of blocks you need is APPROXIMATELY .

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