SOLUTION: In Slippery Creek, Janna can row 50 km downstream in 5 hours or she can row 25 km upstream in the same amount of time. Find the rate she rows in still water.
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Question 27688: In Slippery Creek, Janna can row 50 km downstream in 5 hours or she can row 25 km upstream in the same amount of time. Find the rate she rows in still water.
You can put this solution on YOUR website! Let speed in still water = x km/hr
Let speed of river = y km/hr
speed with river is x+y
speed against river is x-y
with river:
x+y = 50/5
x+y = 10
against river:
x-y = 25/5
x-y = 5
so, add the 2 equations together: 2x = 15 --> x = 7.5 km/hr
and therefore from x+y=10, y = 2.5 km/hr