SOLUTION: 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 k

Algebra ->  Rate-of-work-word-problems -> SOLUTION: 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 k      Log On


   

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?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
               SPEED         TIME        DISTANCE
UP             5-c           4/(5-c)    4
BACK           5+c           4/(5+c)    4
Total                         8

4%2F%285-c%29%2B4%2F%285%2Bc%29=8

highlight_green%281%2F%285-c%29%2B1%2F%285%2Bc%29=2%29

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!
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?
Correct answer: highlight_green%28matrix%281%2C2%2C+2sqrt%285%29%2C+mph%29%29

****WARNING: Keep away from the other person's ATTEMPT at this problem!