alexmarto37211 alexmarto37211

19-03-2024
Physics

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A 300 metres long train is moving due north with a speed of 20 m/s. A small bird is flying due south a little above the train with 5 m/s speed.What is the time taken by the bird to cross the train is?
(1)60s
(2)15s
(3)30s
(4)45s

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