Do question 3,6,7,9,10,11all solution in written page

Dear student, 10) time taken by sound to travel in an iron rail = distance or length of rail/speed of sound in rail = 3300/5280=0.625s. Now time taken by sound to travel in air= 3300/330=10s. ( 11) time taken by sound to travel in air = distance /speed of sound in air=1700/340=5s. Now time taken by sound to travel in water= 1700/1360=1.25s . You can ask other questions in a different thread. Regards

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