<PRE><B>Question 234574</B>
We need to find the time for the up and down trip.

We use the following equation twice to find the time going up and down: d/r = t


Going Up:

9 = (r + 3)t

9/(r + 3) = t

Going Down:

11 = (r - 3)t

11/(r - 3) = t


I will set up the equation and you can finish.


(r + 3)(9/(r + 3) = (r - 3)(11/(r - 3)

Can you finish now?



 
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