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Physics, 13.02.2020 02:07 ladybugys

Maria takes a boat upstream for 9 hours. Her return trip downstream only took 6 hours. If the river she is on has a current of 1 mile per hour, how fast does her boat move in still water?

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Maria takes a boat upstream for 9 hours. Her return trip downstream only took 6 hours. If the river...
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