document.write( "Question 782705: Two men can paint a fence in X hours and (X + 1) hours respectively. Find the time it will take the two men to paint the fence together. \n" ); document.write( "
Algebra.Com's Answer #476491 by stanbon(75887) ![]() You can put this solution on YOUR website! Two men can paint a fence in X hours and (X + 1) hours respectively. Find the time it will take the two men to paint the fence together. \n" ); document.write( "------ \n" ); document.write( "1st man rate:: 1/x job/hr \n" ); document.write( "2nd man rate:: 1/(x+1) job/hr \n" ); document.write( "---- \n" ); document.write( "Together rate: 1/k job/hr \n" ); document.write( "------ \n" ); document.write( "Equation: \n" ); document.write( "rate + rate = together rate \n" ); document.write( "1/x + 1/(x+1) = 1/k \n" ); document.write( "----- \n" ); document.write( "k(x+1) + k(x) = x(x+1) \n" ); document.write( "----- \n" ); document.write( "k[x+1+x] = x^2+x \n" ); document.write( "---- \n" ); document.write( "k = (x^2+x)/(2x+1) hrs (time to do the job together) \n" ); document.write( "================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |