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The limestone blocks from which an ancient pyramid was made weigh about 2 tons per cubic yard. Find the approximate weight of the pyramid having a square base of length 250 yards and a height of 150 yards.

  • geometry -

    vol(pyramid) = (1/3)area of base x height
    = (1/3)(250)^2(150)
    = 3125000 cubic yards.

    each cubic yards weighs 2 tons
    so the pyramid would weigh about 6250000 tons

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