Q1 · medium · AI-verified
Pipe A can fill a tank in 20 minutes and Pipe B can empty it in 30 minutes. If both pipes are opened simultaneously, in how many minutes will the tank be completely filled?
- 50 minutes
- 45 minutes
- 40 minutes
- 60 minutes
Q2 · medium · PYQ 2023
Three persons A, B and C together can do a piece of work in 36 days. A and B together can do five times as much work as C alone; B and C together can do as much work as A alone. If A and C together can do n times as much work as B alone, then what is the value of n?
- 3
- 2
- 2.5
- 1.5
Q3 · medium · AI-verified
A contractor undertakes to complete a road in 40 days and employs 30 workers. After 25 days, he finds that only half the work is done. How many more workers does he need to employ to finish the work on time?
- 20 workers
- 45 workers
- 25 workers
- 30 workers
Q4 · medium · AI-verified
Pipe A can fill a tank in 30 minutes and Pipe B can fill the same tank in 45 minutes. Pipe C can empty the full tank in 60 minutes. If all three pipes are opened simultaneously, how long will it take to fill the tank?
- 45 minutes
- 30 minutes
- 40 minutes
- 36 minutes
Q5 · medium · PYQ 2023
If A and B can finish a work in 10 days, B and C can finish the same work in 12 days, C and A can finish the same work in 15 days; then in how many days can A, B and C together finish half of the work?
- 3 days
- 4 days
- 5 days
- 8 days