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Zero Marks 0 If none of the option is selected Negative Marks 1 If wrong option is selected A train is moving at a speed of v towards the railwayman next to the rails The train whistles for a time of T How long does the railwayman hear the whistle The speed of sound is c 330 m s v 108 km hour 30 m s T 3 s the train does no reach the railwayman until the end of the whistle O 1 732 S O 2 727 S 4 O3 212 S
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