On return from a business trip Mr. X was to be picked up from the railway station by his coachman. However, his meeting having finished before schedule, he left his destination earlier by catching an earlier train as a result of which he arrived 2 hours early. Immediately on arrival he ring up home for the coach and was told that it had must left in order to be exactly in tie for the train by which he was scheduled to come. To save time he started walking home ward a 4 mph. On the way he met the coachman who brought him home an hour before schedule. How far is Mr. Xs house from the railway station? `12\ m i l e s` b. `16\ m i l e s` c. `8\ m i l e s` d. `24\ m i l e s`