A motorboat takes 3 hours to travel 144 mi going upstream. The return trip takes 2 hours going downstream. What is the rate of the boat in still water and what is the rate of the current?
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144/3 = 48 mph upstream
144/2 = 72 mph downstream
The boat's speed is the average = 60 mph
The current is the difference = 72-60 = 12 mph
