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

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**.