document.write( "Question 863214: How far off would a target be if the sound returning is approximately 5 seconds after the explosion that made it. A recent demonstration I viewed was of a rocket fired at a target said to be approx 1.8km. It took 5 seconds for the sound to return \n" ); document.write( "
Algebra.Com's Answer #520274 by Fombitz(32388)\"\" \"About 
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Use the speed of sound.
\n" ); document.write( "Distance = Rate * Time.
\n" ); document.write( "At sea level, the speed of sound is \"340\" \"m%2Fs\".
\n" ); document.write( "\"D=340%285%29=1700m=1.7km\"
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