A and B travel around a circular track at uniform speeds in opposite directions, starting from diametrically opposite points. If they start at the same time, meet first after B has travelled 100 yards, and meet a second time 60 yards before A completes one lap, then the circumference of the track in yards is<spanclass=′latex−bold′>(A)</span>400<spanclass=′latex−bold′>(B)</span>440<spanclass=′latex−bold′>(C)</span>480<spanclass=′latex−bold′>(D)</span>560<spanclass=′latex−bold′>(E)</span>880