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a train running at a speed 55 km/h a takes another 21 seconds to complete cross anthor train B coming from oppsite at the te of length of train Ais 2.5 times the length of train B.train A crosses a brige in 72 seconds .what is length of bridge ?a train running at a speed 55 km/h a takes another 21 seconds to complete cross anthor train B coming from oppsite at the te of length of train Ais 2.5 times the length of train B.train A crosses a brige in 72 seconds .what is length of bridge ?a train running at a speed 55 km/h a takes another 21 seconds to complete cross anthor train B coming from oppsite at the te of length of train Ais 2.5 times the length of train B.train A crosses a brige in 72 seconds .what is length of bridge ?a train running at a speed 55 km/h a takes another 21 seconds to complete cross anthor train B coming from oppsite at the te of length of train Ais 2.5 times the length of train B.train A crosses a brige in 72 seconds .what is length of bridge ?a train running at a speed 55 km/h a takes another 21 seconds to complete cross anthor train B coming from oppsite at the te of length of train Ais 2.5 times the length of train B.train A crosses a brige in 72 seconds .what is length of bridge ?a train running at a speed 55 km/h a takes another 21 seconds to complete cross anthor train B coming from oppsite at the te of length of train Ais 2.5 times the length of train B.train A crosses a brige in 72 seconds .what is length of bridge ?a train running at a speed 55 km/h a takes another 21 seconds to complete cross anthor train B coming from oppsite at the te of length of train Ais 2.5 times the length of train B.train A crosses a brige in 72 seconds .what is length of bridge ?