When a train is at dis†an ce of 2km ,its engine sounds a whistle. A man near the straight railway track hear the whistle directly and by placing his ear against the track of the train.If two sounds are heard at an interval of 5.6s, find the speed of sound in iron(material of rail track).Given that velocity ofsoud in air is 330m/s

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Two electric trains run at the same speed of 72 km/h along the same track and in the same direction with a separation of 2.4 km between them. The two trains simultaneously sound brief whistles. A person is situated at a perpendicular distance of 500 m from the track and is equidistant from the two trains at the instant of the whistling. If both the whistles were at 500 Hz and the speed of sound in air is 340 m/s, find the frequencies heard by the person.

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