Posted by **nola** on Saturday, August 18, 2012 at 11:19pm.

A speedboat moves at a rate of 21 km/hr in still water. How long will it take someone to ride the boat 60 km downstream if the river's current moves at a rate of 9 km/hr?

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**Anonymous**, Monday, April 27, 2015 at 5:38pm
sd

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