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Mathematics 12 Online
OpenStudy (anonymous):

The speed of lazy river's currents 5 mph. If a boat travels 20 miles downstream in the same time that it takes to travel 10 miles upstream, find the speed of the boat in still water

OpenStudy (anonymous):

t*(v+5) = 20 t*(v-5) = 10 where t is time and v is boats speed

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