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A, B and C can finish a piece of work in...

A, B and C can finish a piece of work in 16 days, 20 days and 24 days respectively. They started working together. How many days before B should leave the work so that work must complete in 7 days?

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The correct Answer is:
`1(7)/(12)` days
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ADVANCED MATHS BY ABHINAY MATHS ENGLISH-TIME & WORK -QUESTIONS
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