two locomotives start at the SAME place but Locomotive A gets a half hour head start. Locomotive A travels at 100 km/hr and Locomotive B travels at 140 km/hr.Find the time elapsed and how far each traveled before they meet.

Answer 1

v(A) • (t+0.5) =v(B) •t
0.5•v(A) = (v(B) –v(A)) •t
t= 0.5•v(A) /(v(B) –v(A)) =
=0.5•100/40=1.25 h
s=v(B) •t=140•1.25=175 km