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A boat travels between two cities that are 18 miles apart. When going downstream, with the current, the trip takes 9/8 hour(s). Returning upstream, against the current, the boat covers the same distance in 9/5 hour(s). What is the current of the river? miles per hour What is the speed of the boat in still water?

 Feb 28, 2020
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rate * TIME = DISTANCE

 

DISTANCE/TIME =rate

 

18  /  9/8   =  s + c             s = boat speed   c = current

 

18  /   9/5  =  s - c             add the two equations together to solve for 's'    then you can compute    'c'  (if ya want to)

 

(EDITED)

 Feb 28, 2020
edited by ElectricPavlov  Feb 28, 2020

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