<PRE><B>Question 642593</B>
Wilma drove at an average speed of 50 mi/h from her home in Boston to visit her sister in Buffalo. She stayed in Buffalo 10 hours and, on the trip back, averaged 45 mi/h. She returned home 29 hours after leaving. How many miles is Buffalo from Boston?
**
let x=distance between Buffalo and Boston
Travel time = distance/speed
..
x/50+10+x/45=29
x/50+x/45=29-10
x/50+x/45=19
LCD:50*45
45x+50x=19*50*45
95x=19*50*45
x=(19*50*45)/19=450
distance between Buffalo and Boston=450 miles</PRE>