SOLUTION: A river flows at a rate of 4 km per hour. for a cruiser to travel 60 km upriver then return in a total of 8 hr, how fast must the boat be able to travel in still water?

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: A river flows at a rate of 4 km per hour. for a cruiser to travel 60 km upriver then return in a total of 8 hr, how fast must the boat be able to travel in still water?       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 844312: A river flows at a rate of 4 km per hour. for a cruiser to travel 60 km upriver then return in a total of 8 hr, how fast must the boat be able to travel in still water?

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
a+b=8,
(c+4)*a=60,
(c-4)*b=60
a = 3 hours , b = 5 hours, c = 16 kph