Which river is a tributary of the Mississippi?
Missouri River
Columbia River
Rio Grande
Potomac River
Missouri is the longest tributary of the Mississippi River, it constitutes to 40% of its watershed. However, it is not the largest tributary by volume - more water is brought by the Ohio River.
reach: rather globalgeographyMississippiNorth AmericariversUnited States
Answers by country
Missouri River
Columbia River
Rio Grande
Potomac River
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