<PRE><B>Question 908882</B>
Gaining speed 60 -40= 20 mph
Headstart 40*1 =40 miles
Time to catch up 40/20=2 hours
Algebraic solution
40(t+1)=60t
40t+40=60t
40=60t-40t
40=20t
t=2  hours
Distance to meeting 2*60=120 miles

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