Question 715491: Janet, an experienced shipping clerk,can fill a certain order in 10 hours. Felipe, a new clerk, needs 11 hours to do the same job. Working together, how long will it take them to fill the order?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Janet, an experienced shipping clerk,can fill a certain order in 10 hours. Felipe, a new clerk, needs 11 hours to do the same job. Working together, how long will it take them to fill the order?
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Equation:
rate + rate = together rate
1/10 + 1/11 = 1/x
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11x + 10x = 10*11
21x = 110
x = 110/21 = 5.24 hrs = 5 hrs 14.4 minutes (together time)
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Cheers,
Stan H.
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