SOLUTION: A boat can carry fuel for 8 hours sailing time, and can travel at 16km/h in still water. It goes down stream with a current that moves 4km/h, and goes upstream against the current

Algebra ->  Human-and-algebraic-language -> SOLUTION: A boat can carry fuel for 8 hours sailing time, and can travel at 16km/h in still water. It goes down stream with a current that moves 4km/h, and goes upstream against the current      Log On


   

Question 468172: A boat can carry fuel for 8 hours sailing time, and can travel at 16km/h in still water. It goes down stream with a current that moves 4km/h, and goes upstream against the current that moves at the same speed. How far can it go downstream and return safely?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
16+4=20 km/h downstream
16-4=12 km/h upstream
n/20+n/12=8
3n+5n=480
8n=480
n=60
The boat can travel 60 kilometers safely.
60/20+60/12=3+5=8 hours traveling time..