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Boat Goes Downstream From P To Q In 2hrs, Upstream In 6hrs And If Speed Of Stream Was ½ Of Boat In Still Water. Find Dist PQ?

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Oddman answered
Suppose pq represents the distance, and s represents the speed of the boat.
Downstream, the equation for the travel time is
   pq/(s + s/2) = 2
   pq = 2(3/2s)
   pq = 3s

Upstream, the equation for the travel time is
   pq/(s - s/2) = 6
   pq = 6(s/2)
   pq = 3s

There is insufficient information given to find the actual distance. We can only say it is the distance the boat would travel in still water in 3 hours.

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