SOLUTION: Alvin paddles for 3 hours with a 5 km/ hr current to reach a campsite. The return trip against the same current took 8 hours. Find the speed of the boat in still water.

Algebra ->  Expressions-with-variables -> SOLUTION: Alvin paddles for 3 hours with a 5 km/ hr current to reach a campsite. The return trip against the same current took 8 hours. Find the speed of the boat in still water.      Log On


   

Question 448061: Alvin paddles for 3 hours with a 5 km/ hr current to reach a campsite. The return trip against the same current took 8 hours. Find the speed of the boat in still water.
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
3/x+5=8/x-5
8(x+5)=3(x-5)
8x+40=3x-15
5x=55
x=11
The speed of the boat is 11km/hour..