The swim portion of a triathlon takes place in a river and is an out-and-back course. The river has a steady current that is 0.400 m/s and the athletes swim against the current for 750m before returning and swimming with the current for the second 750m. If one competitor can swim at a steady speed of 1.10 m/s in still water, how long will it take to swim the river? How long without a current?
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