Question

How wide is the mouth often Congo river

Answer 1

4,700 km(2,920 mi)[1]
4,014,500km 2
(1,550,007 sq mi) [1]

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Answer 2

"The length of the Congo and its longest headstream is about 3,000 miles (5,000 kilometers). Each second the Congo River pours 1,200,000 cubic feet (34,000 cubic meters) of water into the Atlantic Ocean."