<PRE><B>Question 1095509</B>
 Lisa and Andy start walking around a circular track from the same spot,
 but going in opposite directions. 
Lisa is walking at 4 feet per second while Andy is walking at 5 feet per second.
 When they meet the first time, Lisa has walked 360 feet.
 What is the circumference of the track? 
:
Find the time it takes L to walk 360 ft; t = dist/speed
{{{360/4}}} = 90 seconds
A also walks for 90 sec, find the distance he walked.
90 * 5 = 450 ft
therefore
360 + 450 = 810 ft this circumference of the track
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