SOLUTION: Alvin paddled for 5 hours within a 4km/h current to reach a campsite. The return of the trip against the same current took 9 hours. Find the speed of the boat in the still water.

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Alvin paddled for 5 hours within a 4km/h current to reach a campsite. The return of the trip against the same current took 9 hours. Find the speed of the boat in the still water.      Log On


   

Question 850188: Alvin paddled for 5 hours within a 4km/h current to reach a campsite. The return of the trip against the same current took 9 hours. Find the speed of the boat in the still water.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
5*(x+4)=9*(x-4)
x = 14 kph for the boat
5*18=9*(10)
90=90