Posted by Beth on Wednesday, March 6, 2013 at 5:48pm.
A penguin swimming with the ocean current in search of food takes 1 hour to travel 9 miles. Its return trip upstream to its starting point takes it 3 hours, What is the penguin's speed in still water?
Thanks.

math  Kristien, Wednesday, March 6, 2013 at 5:51pm
distance = speed/time
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