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OpenStudy (anonymous):
a boat's crew rowed 12 miles downstream with the current in 1.5 hours. the return trip upstream covered the same distance but took 4 hours. find the crews rowing rate in still water and the rate of the current
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OpenStudy (rulnick):
r = d / t so ... row + current = 12 / 1.5 = 8 row - current = 12 / 4 = 3 add the two equations to get 2 row = 11 row = 11/2 = 5.5 therefore current = 2.5 (all in miles per hour)
OpenStudy (rulnick):
Does that help? Need more explanation?
OpenStudy (anonymous):
Thank you
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