SOLUTION: A tour boat travels downstream and turns around and travels back upstream. Each trip is 20 miles, (40 miles total), the current is 5 miles per hour. The length of the tour in hours
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Question 820274: A tour boat travels downstream and turns around and travels back upstream. Each trip is 20 miles, (40 miles total), the current is 5 miles per hour. The length of the tour in hours is a function of the still water speed of the tour boat. Write a function and define the variable you use.
I'm having difficulty writing this into a function, as (to me) there are variables missing. I'm not a word problem person! haha Thank you so much for taking the time to help me!
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
When the boat goes upstream, the rate
of the current gets subtracted
--------------------
When the boat goes downstream, the
rate of the current gets added
--------------------
Let = the speed of the boat in still water
Let = the time to go downstream
Let = the time to go upstream
--------------------
Equation for going downstream:
(1)
Equation for going upstream:
(2)
--------------------
What you're looking for is ,
the time for the whole trip
--------------------
(1)
and
(2)
--------------------
This is
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