<PRE><B>Question 437723</B>
Two cyclists traveling in opposite directions approach each other.
 One is moving at 20 km/h and the other at 18 km/h.
 A bird which flies at an average speed of the second cyclist and then returns
 to the first cyclist, traveling to and fro within the space between the two
 approaching cyclists continuously.
 If the two cyclists meet after 1/2 hour, find the total distance the bird has traveled. 
:
You are given the time it takes the two cyclist to meet,1/2 hr
This is also the travel time of the bird.
:
Bird goes 18 mph, like the 2nd cylclist. 
Dist = speed * time
18 * .5 = 9 km is the total distance traveled by the bird
:
A graph is kind of useless, but here it is, time on the x axis, distance on the y axis
Green is the 20 mph cyclist, red the bird and the 2nd cyclist
{{{ graph( 300, 200, -1, 2, -4, 24, 18x, 19-20x) }}}
They intersect where x = .5 hr, y = 9 km
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