SOLUTION: alvin paddled for 2 hours with a 5-km/h current to reach a campsite. the return trip against the same current took 7 hours. find the speed of the boat?

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Question 471303: alvin paddled for 2 hours with a 5-km/h current to reach a campsite. the return trip against the same current took 7 hours. find the speed of the boat?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
2(n+5)=7(n-5)
2n+10=7n-35
45=5n
n=9
The speed of the boat is 9 km/h..