ANSWER TO QUESTION # 8:

Let's assume that the man and the train normally meet at the crossing at 8 A.M., then the usual time of.the cyclist at the bend is 8 A.M. and he is 6 miles behind at 7.30 A.M. But when the cyclist is late, he arrives at the bend at 8.25 A.M and therefore he is six miles behind at 7.55 A.M. Since the. train takes 5 minutes lo travel the six mile run, the speed of the train is 72 m.p.h.