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A & B are 2 stations in between 90 miles and a train starts from A to B. At the same time a bird starts from B towards the moving train. On reaching the train, the Bird immediately turn back and return to B. The bird makes these journeys from B to the train and back to B continuously till the train reaches B. How many miles did the bird travels. (i) If the speed of the train is 60 miles/hr and speed of the bird is 90 miles/hr. (ii) If the speed of the train is 90 miles/hr and speed of the bird is 60 miles/hr

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