A train driver of moving train sees an obstruction on the track ahead when the train was in Position 1 as indicated in the diagram below. He sounds the horn at Position 1 and receives the echo 2 seconds later at position 2. The distance between Position 1 and Position 2 is 272 meters. The speed of sound in air is 340 m.s'.Assuming the train travelled at constant speed, calculate the distance d between the train at Position 2 and the obstacle. 2 sec Position 1 Position 2 272 m d

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