Q1 · easy · AI-verified
A can complete a work in 10 days and B can complete the same work in 15 days. In how many days can both A and B together complete the work?
- 6 days
- 12 days
- 8 days
- 5 days
Q2 · easy · AI-verified
If 12 workers can complete a work in 18 days, how many days will 9 workers take to complete the same work?
- 16 days
- 20 days
- 27 days
- 24 days
Q3 · medium · AI-verified
A is twice as efficient as B. Together they can finish a work in 18 days. In how many days can A alone finish the work?
- 54 days
- 24 days
- 27 days
- 36 days
Q4 · medium · AI-verified
A pipe can fill a tank in 20 minutes and another pipe can empty it in 30 minutes. If both pipes are opened simultaneously, in how many minutes will the tank be filled?
- 45 minutes
- 40 minutes
- 60 minutes
- 50 minutes
Q5 · medium · AI-verified
A and B together can do a piece of work in 10 days. B and C together can do the same in 15 days. A and C together can do it in 12 days. In how many days can all three together finish the work?
- 10 days
- 6 days
- 9 days
- 8 days