Question 255161
D=RT
D1=50T FOR THE FREIGHT TRAIN.
D2=60(T-1) FOR THE PASSENGER TRAIN
D1+D2=270
50T+60(T-1)=270
50T+60T-60=270
110T=270+60
110T=330
T=330/110
T=3 HOURS OR @ 3:00 PM. THEY WILL BE 270 MILES APART.
PROOF:
50*3+60(3-1)=270
150+60*2=270
150+120=270
270=270