Question 230904
D=RT
50=R(T-1)
50=R/2*T
R(T-1)=RT/2
RT-R=RT/2
2RT-2R=RT
2RT-RT=2R
RT=2R
T=2R/R
T=2 HOURS FOR THE SLOW TRAIN.
2-1=1 HOUR FOR THE FAST TRAIN.
50=R(2-1)
50=R FOR THE FASTER TRAIN.
PROOF:
50=50(2-1)
50-50
50=50/2*2
50=25*2
50=50