WB Police PC · Elementary Mathematics
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Time & Work
Work efficiency and pipes/cisterns.
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Take a full mock →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 they work together, in how many days will they complete the work?
Q2 · Time & Work · MEDIUM
15 workers can complete a construction project in 20 days. After 10 days, 5 workers left the work. In how many more days will the remaining workers complete the project?
Q3 · Time & Work · MEDIUM
A pipe can fill a tank in 6 hours. Due to a leak at the bottom, it takes 9 hours to fill the tank. If the tank is full, in how many hours will the leak empty it?
Q4 · Time & Work · HARD
A and B together can complete a work in 12 days, B and C together can complete it in 15 days, and C and A together can complete it in 20 days. In how many days can A, B, and C together complete the work?
Q5 · Time & Work · EASY
A can complete a work in 12 days and B can complete it in 18 days. If they work together, in how many days will the work be completed?