Question 262729
Two miles upstream from his starting point, a canoeist passed a log floating in a river's current.
 After paddling upstream for another hour, he paddled back and reached his starting point just as the log arrived.
 Find the speed of the current.
:
The relationship of the canoe and the log is not affected by the current.
If the canoe paddled away from the log for 1 hr it would take 1 hr to return to it
Therefore we can say, the log will travel 2 mi in 2 hrs

2/2 = 1 mph is the current