You can
put this solution on YOUR website!time it takes to travel 180 miles upstream. the speed of the current in the stream is 5.5 miles per hour. find the speed of the boat in still water.
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Let the speed of the boat in still water be "b":
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Upstream DATA:
distance = 180 miles ; rate = b-5.5 mph ; Time = d/r = 180/(b-5.5)
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At this point you would like to have equation but without knowing
the time for the upstream trip you cannot determine the speed of
the boat in still water.
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Cheers,
Stan H.