document.write( "Question 557116: Ramil can paint a fence in 4 hours, while Dino can do it in 5 hours. If they work together, what part of the fence can they paint in one hour? How long will it take them to finish painting the fence if they work together? \n" ); document.write( "
Algebra.Com's Answer #362450 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Ramil can paint a fence in 4 hours, while Dino can do it in 5 hours. If they work together, what part of the fence can they paint in one hour? How long will it take them to finish painting the fence if they work together?
\n" ); document.write( "-------
\n" ); document.write( "Ramil rate: 1/4 job/hr
\n" ); document.write( "Dino rate: 1/5 job/hr
\n" ); document.write( "together rate: 1/x job/hr
\n" ); document.write( "-----
\n" ); document.write( "Equation:
\n" ); document.write( "rate + rate = together rate
\n" ); document.write( "1/4 + 1/5 = 1/x
\n" ); document.write( "5x + 4x = 20
\n" ); document.write( "9x = 20
\n" ); document.write( "Together rate: 1/x = 9/20 job/hr
\n" ); document.write( "----
\n" ); document.write( "Time to finish the job (11/20 th of the job)
\n" ); document.write( "---
\n" ); document.write( "Let \"x\" be amount of time to finish the job together.
\n" ); document.write( "x(20/9) = 21/20
\n" ); document.write( "x = 21/9 hrs = 2 1/3 hrs
\n" ); document.write( "===================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "===========
\n" ); document.write( " \n" ); document.write( "
\n" );