Answer:
at 25.5 S = 25.5 * t
at 18.8 S = 18.8 t + 1560 m since this truck has 1560 m lead
25.5 * t = 18.8 t + 1560
t = 1560 m / 6.7 m/sec = 233 sec
9.4m questions
12.2m answers