DD&DNH Recruitment · Time and Work · Quiz
Time and Work — quick quiz
1 DD&DNH Recruitment-pattern questions on Time and Work. Instant scoring and solutions, no signup — see where you stand in a few minutes.
Question 1 of 1
EasyA cistern can be filled by pipe A in 12 hours and by pipe B in 15 hours. A drain pipe C can empty the full cistern in 20 hours. If all three pipes are opened together when the cistern is empty, how long will it take to fill the cistern completely?