document.write( "Question 561809: 4 men take 8 hours to build a wall, how long will it take 7 men to build an identical wall? \n" ); document.write( "
Algebra.Com's Answer #364388 by ptaylor(2198)\"\" \"About 
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\n" ); document.write( "If 4 men take 8 hours to build a wall, then the wall require 4*8=32 man hours to build. In other words:
\n" ); document.write( "32 men could build the wall in 1 hour
\n" ); document.write( "16 men could build the wall in 2 hours
\n" ); document.write( "8 men could build the wall in 4 hours
\n" ); document.write( "etc\r
\n" ); document.write( "\n" ); document.write( "Now 7 men would take 32/7=4.57 hr to build the wall\r
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\n" ); document.write( "\n" ); document.write( "Another way:
\n" ); document.write( "Let x=time it takes 7 men to build the wall
\n" ); document.write( "1 man works at the rate of 1/32 of the wall per hour
\n" ); document.write( "7 men works at the rate of 7/32 of the wall per hour
\n" ); document.write( "soooo
\n" ); document.write( "7/32*x=1 (1 wall that is)
\n" ); document.write( "x=32/7=same as above\r
\n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor\r
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