Question 269585
D=RT
201=(X+X+12)1.5
201=(2X+12)1.5
201=3X+18
3X=201-18
3X=183
X=183/3
X=61 MPH IS THE SPEED OF THE SLOWER TRAIN.
61+12=73 MPH FOR THE FASTER TRAIN.
PROOF:
201=(61+73)*1.5
201=134*1.5
201=201