Q1 · medium · AI-verified
A tap can fill a cistern in 4 hours. Due to a leak at the bottom, it takes 5 hours to fill the cistern. In how many hours can the leak empty the full cistern?
- 20 hours
- 25 hours
- 15 hours
- 18 hours
Q2 · medium · AI-verified
A, B and C together can complete a work in 8 days. A alone can complete it in 20 days and B alone can complete it in 30 days. In how many days can C alone complete the work?
- 30 days
- 15 days
- 18 days
- 24 days
Q3 · medium · AI-verified
24 men working 8 hours a day can complete a work in 15 days. In how many days can 18 men working 10 hours a day complete the same work?
- 16 days
- 20 days
- 18 days
- 14 days
Q4 · medium · AI-verified
A pipe can fill a tank in 6 hours and another pipe can empty it in 8 hours. If both pipes are opened simultaneously, in how many hours will the tank be filled?
- 24 hours
- 20 hours
- 18 hours
- 16 hours
Q5 · medium · AI-verified
A pipe can fill a tank in 6 hours and another pipe can empty the same tank in 9 hours. If both pipes are opened simultaneously, in how many hours will the tank be filled?
- 21 hours
- 15 hours
- 12 hours
- 18 hours