SOLUTION: It takes a couple three hours to row 24 miles with the river current. If it takes them 6 hours to cover the same distance when rowing against the current, find the speed of the riv

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Question 911888: It takes a couple three hours to row 24 miles with the river current. If it takes them 6 hours to cover the same distance when rowing against the current, find the speed of the river current.
Answer by lwsshak3(11628) About Me  (Show Source):
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It takes a couple three hours to row 24 miles with the river current. If it takes them 6 hours to cover the same distance when rowing against the current, find the speed of the river current.
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let x=speed of rowboat in still water
c=speed of current
x+c=speed of rowboat with current
x-c=speed of rowboat against current
..
distance=travel time*speed
3(x+c)=24
6(x-c)=24
..
3x+3c=24
6x-6c=24
..
6x+6c=48
6x-6c=24
subtract
12c=24
c=2
speed of the river current=2 mph