Work efficiency, pipes and cisterns.
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Q1 · Time & Work · EASY
A can complete a piece of work in 12 days and B can complete the same work in 18 days. If both A and B work together, in how many days will they complete the work?
Q2 · Time & Work · MEDIUM
A pipe can fill a tank in 15 hours. Due to a leak at the bottom, it takes 20 hours to fill the tank. If the tank is full, in how many hours will the leak empty it?
Q3 · Time & Work · MEDIUM
20 men can complete a work in 16 days. After 6 days of work, 5 more men joined them. In how many more days will the remaining work be completed?
Q4 · Time & Work · HARD
A and B together can complete a work in 8 days. B and C together can complete it in 12 days. A and C together can complete it in 16 days. In how many days can A, B and C together complete the work?
Q5 · Time & Work · HARD
A can complete a work in 18 days and B can complete the same work in 12 days. If they work together for 4 days, what fraction of the work remains?