<PRE><B>Question 635387</B>
Distance(d) equals Rate(r) times Time(t) or d=rt; r=d/t and t=d/r
Let d=distance walked one way; 2d=total distance walked
Time walking at 5 mi/hr=d/5
Time walking at 4 mi/hr=d/4

And we are told that the above times add up to 3 3/20 hr.
3 3/20 hr=63/20 hr
So our equation to solve is:
d/5 +d/4=63/20  multiply each term by 20
4d+5d=63 
9d=63
d=7 mi
2d = total distance walked =2*7=14 mi---ans

Hope this helps---ptaylor</PRE>