Question 226104
D=RT
D=80T
D=84(T-.5)
Because the distances are the same:
80T=84(T-.5)
80T=84T-42
80T-84T=-42
-4T=-42
T=-42/-4
T=10.5 HOURS. TRAIN B WILL CATH-UP WITH TRAIN A.
PROOF:
80*10.5=84*10
840=840