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Slicing Pizzas, Racing Turtles, and Further Adventures in Applied Mathematics by Robert B. Banks

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5

Raindrops and Other Goodies Revisited

Runoff of Rivers

Our saga now continues. Readers will recall that the incredible Amazon river in South America delivers 180,000 cubic meters of water per second to the Atlantic ocean. This is about thirty times more than the flow over Niagara Falls. The drainage area of the Amazon is about 7 million square kilometers—about ten times the size of Texas. Much of the Amazon basin receives heavy rainfall to sustain the well-known rain forests.

On a smaller scale, the same things can be said about the world's second river: the Congo (or Zaire) in Africa. It collects water from a drainage area of 3.5 million square kilometers and empties over 41,000 cubic meters per second into the Atlantic. The Congo basin is ...

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