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A can plough a field in 60 hours; B can do it in 48 hours and C can do it in 50 hours. How long will it take C to finish ploughing it alone after A and B have each done 12 hours of work?

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  • Pta DC
    Pta DC Nov 04, 2012

    anyone knows this?



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A does 1/5. B does 1/4. That leaves 55%. C takes 27.5 hrs.

Posted on Nov 11, 2012

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