SOLUTION: A motor boat takes 5 hours to travel 200km going upstream. The return trip takes 4 hours going downstream. What is the rate if the boat in still water and what is the rate of the o

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Question 1077233: A motor boat takes 5 hours to travel 200km going upstream. The return trip takes 4 hours going downstream. What is the rate if the boat in still water and what is the rate of the of the current?
Found 2 solutions by Boreal, josgarithmetic:
Answer by Boreal(15235)   (Show Source): You can put this solution on YOUR website!
Goes upstream at 40 km/h, 200/5, which is speed of boat-current= s-c
Goes downstream at 50 km/h, s+c
s-c=40
s+c=50
2s=90
s=45 km/h speed in still water
c=5 km/h current
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
                 SPEED     TIME     DISTANCE
UPSTREAM          r-c       5        200
DOWNSTREM         r+c       4        200



------solve this system for r and c.


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