P and Q need 8 days to complete a work. Q and R need 12 d... — Answer & Explanation | PrepBeePakistan

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MEDIUMENGLISHMathematics

P and Q need 8 days to complete a work. Q and R need 12 days to complete the same work. But P, Q and R together can finish it in 6 days. How many days will be needed if P and R together do it?

Correct answer: B

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