SOLUTION: A fish boat can travel 60 km with a 2.5-km/hr current in 2 hr less time than it can travel 60 km against the current. Determine the speed of the fishing boat in still water.

Question 1050250: A fish boat can travel 60 km with a 2.5-km/hr current in 2 hr less time than it can travel 60 km against the current. Determine the speed of the fishing boat in still water.
Answer by jorel555(1290) (Show Source): You can put this solution on YOUR website!
Let r be the rate of the boat in still water. Then:
60/(r+2.5)+2=60/(r-2.5)
60(r-2.5)+2(r�-6.25)=60(r+2.5)
60r-150+2r�-12.5=60r+150
2r�-312.5=0
4r�-625=0
(2r+25)(2r-25)=0
r=12.5, -12.5
The rate of the boat in still water is 12.5 km/h. ☺☺☺☺
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