document.write( "Question 708075: Cara can pick enough apples to fill a barrel in half an hour. Jim takes 42 minutes to do it. In how many minutes can they pick a barrel full if they do it together? \n" ); document.write( "
Algebra.Com's Answer #435969 by josgarithmetic(39630)\"\" \"About 
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If they work together, we are assuming their rates are additive.\r
\n" ); document.write( "\n" ); document.write( "Cara does 1 barrel in 30 minutes, rate is 1/30.
\n" ); document.write( "Jack's work rate is 1/42 barrels per minute.\r
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\n" ); document.write( "\n" ); document.write( "Working together, their rate is \"1%2F30%2B1%2F42\".\r
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\n" ); document.write( "\n" ); document.write( "Using the relation rate*time=jobs, to do ONE job, (fill 1 barrel), we have
\n" ); document.write( "\"%281%2F30%2B1%2F42%29%2At=1\".\r
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\n" ); document.write( "\n" ); document.write( "The number of minutes then for both of them doing this one job is
\n" ); document.write( "\"t=1%2F%281%2F30%2B1%2F42%29\".\r
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\n" ); document.write( "\n" ); document.write( "Just look at the rate and simplify that first:
\n" ); document.write( "\"r=%287%2B5%29%2F%282%2A3%2A5%2A7%29\"
\n" ); document.write( "\"r=12%2F72\"
\n" ); document.write( "\"r=1%2F6\", 1 barrels in 6 minutes\r
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\n" ); document.write( "\n" ); document.write( "Refer back a bit to \"t\", that job is done in 6 minutes.
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