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Stitz-Zeager_College_Algebra_e-book

# 1 when we add our second payment at the end of the

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Unformatted text preview: the river, so let’s call that R (measured in miles per hour to be consistent with the other rate given to us.) To get started, let’s divide the trip into its two parts: the initial trip downstream and the return trip upstream. For the downstream trip, all we know is that the distance traveled is 5 miles. distance downstream = rate traveling downstream · time traveling downstream 5 miles = rate traveling downstream · time traveling downstream Since the return trip upstream followed the same route as the trip downstream, we know the distance traveled upstream is also 5 miles. distance upstream = rate traveling upstream · time traveling upstream 5 miles = rate traveling upstream · time traveling upstream We are told Carl can canoe at a rate of 6 miles per hour in still water. How does this ﬁgure into the rates traveling upstream and downstream? The speed the canoe travels in the river is a combination of the speed at which Carl can propel the canoe in still water, 6 miles per hour, and the speed of the river,...
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