How far will the Chevy travel before catching up to the Ford?

A Ford is traveling with a speed of 15m/s and is 200 meters ahead of a Chevy traveling in the same direction at 20m/s.|||time needed


t=200/(20-15)=40 s


then s1= v1*t=20*40 =800 m for Chevy


and s2=v2*t=15*40=600 m for Ford