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A stone is dropped into a lake by a person from a 500 m high tower. He would hear the sound of after approximately. (a) 10 s (b) 11.5 s (c) 14 s (d) 21 s

 A stone is dropped into a lake by a person from a 500 m high tower. He would hear the sound of after approximately. (a) 10 s (b) 11.5 s (c) 14 s (d) 21 s 

Grade:12th pass

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