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                                The tallest building in the world is the Burj Khalifa in Dubui.  It is a. 1000 feet tall, b. 1/2 mile tall, c. 782 feet tall, d. 36,000 feet tall.
                                b. It is over 1/2 mile tall!  If you fell from the top, it would take you over 15 seconds to get to the bottom!