Burj khalifa is the tallest building in the world. It is skysraper in Dubai. It has 163 floors its height is 827.8 mts. (2722 ft.) It is the tallest man - made structure in the world. Its base is 33310059.ft it has the longest water supply line. It has the longest lifts. Its cost of construction was US $1.5 billion it is the most expensive building
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