SOLUTION: 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
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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? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! 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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exp worker rate = 1/100 job/min
together worker rate = 1/60 job/min
trainee worker rate = 1/x job/min
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Equation:
rate + rate = together rate
1/100 + 1/x = 1/60
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Multiply thru by 100*60x to get:
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60x + (100*60) = 100x
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40x = 6000
x = 150 minutes (time for the trainee to do the job alone)
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Cheers,
Stan H.
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