TNPSC Group II · Aptitude and Mental Ability
Work efficiency, pipes and cisterns.
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Q1 · Time and Work · EASY
A can complete a work in 12 days and B can complete the same work in 18 days. If both work together, how many days will they take to complete the work?
Q2 · Time and Work · MEDIUM
15 workers can complete a construction project in 20 days. After 10 days of work, 5 workers left. How many more days will the remaining workers take to complete the project?
Q3 · Time and Work · MEDIUM
A pipe can fill a tank in 6 hours. A drain pipe can empty the same tank in 8 hours. If both pipes are opened together, how long will it take to fill the empty tank?
Q4 · Time and Work · HARD
A and B together can complete a work in 10 days. B and C together can complete it in 15 days. A and C together can complete it in 12 days. How many days will A alone take to complete the work?
Q5 · Time and Work · MEDIUM
Two pipes A and B can fill a tank in 12 minutes and 18 minutes respectively. Both pipes are opened together, but after 3 minutes, pipe B is closed. How much more time will pipe A alone take to fill the remaining tank?