SOLUTION: An installer can carpet a room in 3 hrs, an assistant needs 4.5 hours. If the assistant helps for one hour and then is called away, how long will it take the installer to finish
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Question 454223: An installer can carpet a room in 3 hrs, an assistant needs 4.5 hours. If the assistant helps for one hour and then is called away, how long will it take the installer to finish
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
An installer can carpet a room in 3 hrs, an assistant needs 4.5 hours. If the assistant helps for one hour and then is called away, how long will it take the installer to finish
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Installer rate = 1/3 job/hr
Assistant rate = 1/(9/2) = 2/9 job/hr
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Equations:
work + work = job done
1(2/9) + (1/3)x = 1
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(1/3)x = 7/9
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x = 7/3 = 2 1/3 hrs
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Cheers,
Stan H.
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