Posted by **help** on Sunday, April 21, 2013 at 6:17am.

The velocity of sound in the atmosphere is c=300 m/s. An airplane is traveling with velocity v=600 m/s at an altitude of h=8 km over an observer. How far horizontally past the observer in kilometers will the plane be when the observer first hears the noise of the airplane?

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**er**, Sunday, April 21, 2013 at 12:57pm
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