document.write( "Question 652081: two masons can build a wall in 3.5 hours. Calculate how long it will take 5 masons to build the same wall. \n" ); document.write( "
Algebra.Com's Answer #407902 by ptaylor(2198)\"\" \"About 
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OK. It takes 2*3.5 or 7 mason hours to build the wall. In other words, one mason can build the wall in 7 hours; two masons can build the wall in 7/2=3.5 hours; 3 masons can build the wall in 7/3 hours, etc.\r
\n" ); document.write( "\n" ); document.write( "5 masons can build the wall in 7/5=1.4 hours\r
\n" ); document.write( "\n" ); document.write( "Another way to look at this problem:
\n" ); document.write( "Let x=amount of time it takes 5 masons to build the wall
\n" ); document.write( "Then 5 masons work at the rate of 1/x wall per hour
\n" ); document.write( "One mason works at the rate of 1/5x wall per hour
\n" ); document.write( "But 2 masons work at the rate of 1/3.5 wall per hour
\n" ); document.write( "And one mason works at the rate of 1/7 wall per
\n" ); document.write( "soooo:
\n" ); document.write( "1/5x=1/7
\n" ); document.write( "5x=7
\n" ); document.write( "x=1.4 hours----time it takes 5 masons to build the wall\r
\n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor
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