HR Police PC · Numerical Ability and Quantitative Aptitude
Work efficiency, joint work and pipes-and-cisterns.
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Q1 · Time and 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 and Work · MEDIUM
15 men can complete a construction work in 20 days. After 10 days of work, 5 more men joined them. In how many more days will the work be completed?
Q3 · Time and 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?
Q4 · Time and Work · HARD
A and B together can complete a work in 12 days. B and C together can complete it in 15 days. A and C together can complete it in 20 days. In how many days can A alone complete the work?
Q5 · Time and Work · MEDIUM
A can complete a piece of work in 15 days and B can complete the same work in 20 days. If both work together, how many days will they take to finish the work?