SOLUTION: A paddle boat can move at a speed of 20km/h in still water. The boat is paddles 10km downstream in a river in the same time it takes to go 5km upstream. What is the speed of the ri

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Question 994638: A paddle boat can move at a speed of 20km/h in still water. The boat is paddles 10km downstream in a river in the same time it takes to go 5km upstream. What is the speed of the river?
Answer by macston(5194)   (Show Source): You can put this solution on YOUR website!
.
r=rate of river
.
Upstream:
.


.
Downstream:


.
Since :
.


.

.

r=6.667 km/hr
.
ANSWER: The speed of the current was 6.667 kilometers per hour.
.
CHECK:













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