The CN Tower in Toronto and the Sears Tower in Chicago are two of the tallest structures in the world. The CN Tower is 553 m tall. It is 110 m taller than the Sears Tower. How tall is the Sears Tower?

To find the height of the Sears Tower, we can subtract the additional height of the CN Tower from the total height of the two structures.

The CN Tower is 553 m tall. Since it is 110 m taller than the Sears Tower, we can subtract 110 m from the total height of the two structures to find the height of the Sears Tower.

Total height of the CN Tower and the Sears Tower = CN Tower height + additional height
Total height = 553 m + 110 m
Total height = 663 m

Therefore, the Sears Tower is 663 m tall.