<PRE><B>Question 1065516</B>
A man rows downstream at the rate of 5 mph and upstream at the rate of 2mph. How far downstream should he go if he is to return 7/4 hours after leaving? 
-----------------------
Downstream DATA:
rate = 5 mph ; distance = d miles ; time = d/5 hrs
---------------
Upstream DATA:
rate = 2 mph ; distance = d miles ; time = d/2 hrs
------
Equation:
d/5 + d/2 = 7/4
--
Multiply thru by 20 to get
4d + 10d = 35
d = 35/14
distance = 2.5 miles
----------------
Cheers,
Stan H.
------------</PRE>