Work efficiency, pipes and cisterns.
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Q1 · Time and Work · MEDIUM
A can complete a job in 18 days. B can complete the same job in 27 days. If they work together for 6 days and then A leaves, how many more days will B take to finish the remaining work?
Q2 · Time and Work · HARD
P and Q together can complete a work in 12 days. Q and R together can complete it in 15 days. P and R together can complete it in 20 days. How many days will P alone take to complete the work?