Question

When Neil was 2 miles upstream from camp on a canoe trip, he passed a log floating downstream with the current. He paddled upstream for 1 more hour and then returned to camp just as the log arrived. What was the rate of the current?
Neil: 2 mi/hr
current: 1 mi/hr

Check:
In 1 hour, Neil rowed 1 mi upstream.
In 1 more hour, he rowed 3 mi downstream back to camp

In those 2 hours, the log floated 2 miles downstream to camp

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