A pipe can fill a tank in x hours and another can empty it in, y hours. They can together fill it in (y > x)

A pipe can fill a tank in x hours and another can empty it in, y hours. They can together fill it in (y > x)
1). $\frac{xy}{y-x}$hours
2). x-y hours
3). y-x hours
4). $\frac{xy}{x-y}$ hours

SSC CGL Books

---

Join Telegram Group

Other Questions

1. A tap drips at a rate of one drop/ sec, 600 drops make 100ml. The number of litres wasted in 300 days is

2. Two pipes A and B can fill a tank in 6 hours and 8 hours respectively. If both the pipes are opened together, then after how many hours should B be closed so that the tank is full in 4 hours

3. Pipes P and Q can fill a tank in 10 and 12 hours respectively and C can empty it in 6 hours. If all the three are opened at 7 a.m., at what time will one-fourth of the tank be filled

4. Three pipes A, B and C can fill cistern in 6 hours. After working at it together for 2 hours, C is closed and A and B fill it in 7 hours more. The time taken by C alone to fill the cistern is

5. A tank can be filled by two pipes in 20 minutes and 30 minutes respectively. When the tank was empty, the two pipes were opened. After some time, the first pipe was stopped and the tank was filled in 18 minutes. After how much time of the start was the first pipe stopped

6. A tank has a leak which would empty the completely filled tank in 10 hours. If the tank is full of water and a tap is opened which admits 4 litres of water per minute in the tank, the leak takes 15 hours to empty the tank. How many litres of water does the tank hold

7. Three taps A,B and C together can fill an empty cistern in 10 minutes.The tap A alone can fill it in 30 minutes and the tap B alone in 40 minutes. How long will the tap C alone take to fill it

8. Having the same capacity 9 taps fill up a water tank in 20 minutes. How many taps of the same capacity are required to fill up the same water tank in 15 minutes

9. A tank is fitted with two taps.The first tap can fill the tank completely in 45 minutes and the second tap can empty the full tank in one hour. If both the taps are opened alternately for one minute, then in how many hours the empty tank will be filled com- pletely

10. Three pipes P, Q and R can separately fill a cistern in 4,8 and 12 hours respectively. Another pipe S can empty the completely filled cistern in 10 hours. Which of the following arrangements will fill the empty cistern in less time than others