<PRE><B>Question 1110733</B>
 A motorboat takes 3 hours to travel 108mi going upstream. The return trip takes 2 hours going downstream. What is the rate of the boat in still water and what is the rate of the current? 
-----------------------
Upstream DATA:
rate = 108 mi/3 hrs = 36 mph
downstream DATA:
rate = 108/2 = 54 mph
-------
Equations:
b - c = 36 mph
b + c = 54 mph
---------------------
2b = 90
boat speed = 45 mph
---------------
Solve for &quot;c&quot;:
b + c = 54
45 + c = 54
current = 9 mph
---------------
Cheers,
Stan H.</PRE>