what is the length of great wall of china
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Answer:
21,196 km
Explanation:
The wall measures 21,196.18km (13,170.6956 miles) long based on the latest state survey results, state-run news agency Xinhua reported on Tuesday. A preliminary study released in 2009 estimated the wall to be 8,850km long. The world's largest man-made structure was built to protect China's northern border.
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