Question 829865: Time it takes to go upstream is 6 hours to complete the course. Time to go downstream is 2 hours to complete the course. What is the rate of current and how long is the course?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39625)   (Show Source):
You can put this solution on YOUR website! "Complete the course", must be a specific distance, a variable, d, IN ONE DIRECTION.
r is vehicle speed when no current.
c is speed of current.
Also
u=time upsteam, known 6
b=time downstream, known 2
___________________speed___________time______________distance
Upstream___________r-c_____________u_________________d
Downstream_________r+c_____________b_________________d
Your problem description is incomplete. You have three unknown variables: r, c, and d. You can make ONLY TWO equations which are these:
 and 
Do you have more information known?
Answer by MathTherapy(10555)  (Show Source):
You can put this solution on YOUR website!
Time it takes to go upstream is 6 hours to complete the course. Time to go downstream is 2 hours to complete the course. What is the rate of current and how long is the course?
Distance:  units
C, or current speed = 1 – ˝, or  of a unit
You can do the check!!
If you need a complete and detailed solution, let me know!!
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