document.write( "Question 250328: A clerk can add 40 columns of figures an hour by using an adding machine and 20 columns of figures an hour without using an adding machine. The total of number of hours it would take him to add 200 columns if he does 3/5 of the work by machine and the rest without the machine is? \n" ); document.write( "
Algebra.Com's Answer #182414 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
A clerk can add 40 columns of figures an hour by using an adding machine and 20 columns of figures an hour without using an adding machine.
\n" ); document.write( " The total of number of hours it would take him to add 200 columns if he does 3/5 of the work by machine and the rest without the machine is?
\n" ); document.write( ":
\n" ); document.write( "Time required to add 200 columns with machine: 200/40 = 5 hrs
\n" ); document.write( "Time required to add 200 columns without machine: 200/20 = 10 hrs
\n" ); document.write( ":
\n" ); document.write( "With Machine: \"3%2F5\"*5 = 3 hrs to do 3/5 of the work
\n" ); document.write( "then
\n" ); document.write( "W/out Machine:\"2%2F5\"*10 = 4 hrs to do remaining 2/5 of the work
\n" ); document.write( ":
\n" ); document.write( "Total time = 7 hrs
\n" ); document.write( ";
\n" ); document.write( ":
\n" ); document.write( "Is this true?
\n" ); document.write( "Machine does 3*40 = 120 columns
\n" ); document.write( "No machine does 4 * 20 = 80 columns
\n" ); document.write( "total done = 200 columns\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );