A and B can do a piece of work in 21 and 24 days respecti... — Answer & Explanation | PrepBeePakistan

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MEDIUMENGLISHMathematics

A and B can do a piece of work in 21 and 24 days respectively.They start the work together and after some days, A leaves and B completes the rest of the task in 9 days. After how many days did A leave?

Correct answer: C

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