Question 1089240
Zene decides to canoe 4 miles upstream on a river to a waterfall and then canoe back. The total trip​ (excluding the time spent at the​ waterfall) takes 8 hours. Zene knows she can canoe at an average speed of 5 miles per hour in still water. What is the speed of the​ current?
<pre>Correct answer: {{{highlight_green(matrix(1,2, 2sqrt(5), mph))}}}
****WARNING: Keep away from the other person's ATTEMPT at this problem!