document.write( "Question 1141230: A certain hill is represented by a hemisphere of radium 1km. A man 180cm tall walks down the hill from the summit S at 6km/h. How long (correct to the nearest second) will it be before he is invisible to a person lying on the ground at S \n" ); document.write( "
Algebra.Com's Answer #761865 by Alan3354(69443)\"\" \"About 
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Where is S? \n" ); document.write( "
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