document.write( "Question 636394: a gun is fired from a distance of 1.2 km from a hill . The echo of the sound is heard back at the same place after 8 seconds find the velocity of sound??\r
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Algebra.Com's Answer #400991 by ankor@dixie-net.com(22740)\"\" \"About 
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a gun is fired from a distance of 1.2 km from a hill .
\n" ); document.write( " The echo of the sound is heard back at the same place after 8 seconds
\n" ); document.write( " find the velocity of sound??
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\n" ); document.write( "change 1.2 km to 1200 meters, round trip will be 2400 meters
\n" ); document.write( "\"2400%2F8\" = 300 m/sec is the speed of sound
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