A train, an hour after starting, meets with an accident which detains it a half hour, after which it proceeds at 43 of its former rate and arrives 321 hours late. Had the accident happened 90 miles farther along the line, it would have arrived only 3 hours late. The length of the trip in miles was:
<spanclass=′latex−bold′>(A)</span>400<spanclass=′latex−bold′>(B)</span>465<spanclass=′latex−bold′>(C)</span>600<spanclass=′latex−bold′>(D)</span>640<spanclass=′latex−bold′>(E)</span>550