document.write( "Question 1143495: Working together, it takes two computers 4 minutes to send out a company's email. If it takes the slower computer 9 minutes to do the job on its own, how long will it take the faster computer to do the job on its own? \n" ); document.write( "

Algebra.Com's Answer #764326 by ikleyn(53764) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "The rate of work of two computers working together is    of the job per minute.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "The rate of work of the slower computer is    of the job per minute.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Hence, the rate of work of the faster computer is the difference   -  =  =   of the job per minute.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "It means that the faster computer can complete the job in  minutes = 7 minutes and 12 seconds working alone.     ANSWER \r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "Solved.\r
\n" ); document.write( "\n" ); document.write( "

 \r\n" );
document.write( "     When solving problems like this one, you should know and should remember two basic facts:\r\n" );
document.write( "\r\n" );
document.write( "         - the rate of work of two workers/machines/tubes  is the sum of the rates of individuals;\r\n" );
document.write( "\r\n" );
document.write( "         - If you are given the combined rate of work of two workers/machines/tubes and the rate of work of one individual, \r\n" );
document.write( "           then the rate of work of the other individual is the difference of rates.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "Completely self-evident facts.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "----------------\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "It is a standard and typical joint work problem.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "There is a wide variety of similar solved joint-work problems with detailed explanations in this site. See the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Using Fractions to solve word problems on joint work \r
\n" ); document.write( "\n" ); document.write( "    - Solving more complicated word problems on joint work \r
\n" ); document.write( "\n" ); document.write( "    - Selected joint-work word problems from the archive \r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Read them and get be trained in solving joint-work problems.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this textbook under the topic
\n" ); document.write( "\"Rate of work and joint work problems\" of the section \"Word problems\".\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );