Homework Help: algebra/ word problem

Posted by lulu on Wednesday, January 9, 2013 at 9:18pm.

Justin paddles his kayak 6 miles upstream in 1,5 hours. he turns around and paddles downstream, the same distance, in only 1 hour. What is the rate in still water and what is the rate of the water's current

algebra/ word problem - HELP HELP HELP MNHS, Wednesday, January 9, 2013 at 9:29pm
let x - rate in still water
y - rate of current
R * T = D
UPS x-y 1.5 6mi
DOWNS x+y 1 6mi

1.5(x-y)=6 ----- 1.5x-1.5y = 6
-1.5[(x+y)=6] -- -1.5x-1.5y = -9
________________
by elimination -3y = -3
method y = 1mph(current)
x+1=6
x=5mph (still water)

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