Correction for the weight of The Sears Tower
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How heavy is 454.960 pennyweights?
It's about 0.000000004 times as heavy as The Sears Tower
The weight of The Sears Tower is about 129,800,000,000 pennyweights.
(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 129,800,000,000 pennyweights. The outer wall surface of the Tower is covered with black anodized aluminum panels which would total 110,000 sq. m (28 acres) if laid out together.