<PRE><B>Question 153653</B>
their rate of closure (sum of their speeds) is 14.4/4 or 3.6 mph


so B+A=3.6 __ and B=A+.6


substituting __ (A+.6)+A=3.6 __ 2A=3 __ A=1.5


B=(1.5)+.6 __ B=2.1</PRE>