document.write( "Question 748790: An experienced worker can unload a truck in one hour forty minutes. When he works together with a trainee, they can unload the truck in one hour. How long would the trainee need to unload the truck if he works alone? \n" ); document.write( "
Algebra.Com's Answer #455641 by stanbon(75887)\"\" \"About 
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An experienced worker can unload a truck in one hour forty minutes. When he works together with a trainee, they can unload the truck in one hour. How long would the trainee need to unload the truck if he works alone?
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\n" ); document.write( "exp worker rate = 1/100 job/min
\n" ); document.write( "together worker rate = 1/60 job/min
\n" ); document.write( "trainee worker rate = 1/x job/min
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\n" ); document.write( "Equation:
\n" ); document.write( "rate + rate = together rate
\n" ); document.write( "1/100 + 1/x = 1/60
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\n" ); document.write( "Multiply thru by 100*60x to get:
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\n" ); document.write( "60x + (100*60) = 100x
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\n" ); document.write( "40x = 6000
\n" ); document.write( "x = 150 minutes (time for the trainee to do the job alone)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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