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?
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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) (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
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