Q: Pipes P and Q can fill the tank in 24 minutes and 32 minutes respectively. Both pipes are opened together. To have the tank full in 18 minutes, after how many minutes the pipe P must be closed?

Q: Two taps are running continuously to fill a tank. The 1st tap could have filled it in 5 hours by itself and the second one by itself could have filled it in 20 hours. But the operator failed to realize that there was a leak in the tank from the beginning which caused a delay of one hour in the filling of the tank. Find the time in which the leak would empty a filled tank.

Q: A Tank is filled with the mixture of Milk and Water in the ratio of 3:2 up to 2/5 of its capacity. The tank has two inlet pipes i.e., Milk and Water inlets. Milk and Water pipe can fill an empty tank in 12 and 18 hours respectively. Now both pipes are opened simultaneously and closed after the Tank is completely filled, then what is the ratio of Milk and Water in the full Tank if it can accommodate 250Litre?

Q: Two pipes can fill a cistern separately in 24 and 40 minutes respectively and waste pipe can drain off 30 litres per minute. If all the three pipes are open, the cistern fills in one hour. What is capacity of the cistern?

Q: The Bubna dam has four inlets. Through the first three inlets, the dam can be filled in 12 minutes; through the second, the third and the fourth inlet, it can be filled in 15 minutes and through the first and the fourth inlet, in 20 minutes. How much time will it take all the four inlets to fill up the dam? 

Q: One fill pipe A is 3 times faster than second fill pipe B and takes 16 minutes less than the fill pipe B. When will the cistern be half full if both pipes are opened together?

Q: X number of pipes fills a tank in 10 hours. If number of pipes decreases by 10, then number of days increases by 5 hours. Find the number of pipes required to fill the half of of the tank in 15 hours.

Q: An Inlet pipe can fill a tank in 5 hours and an Outlet pipe can empty 4/7 of the same Tank in 4 hours. In the first hour, only the Inlet pipe is opened and in the second hour, only the outlet pipe is opened. They have opened alternately every hour until the Tank is filled. Then in how many hours does the Tank gets filled?

Q: A tank of capacity 25 litres has an inlet and an outlet tap. If both are opened simultaneously, the tank is filled in 5 minutes. But if the outlet flow rate is doubled and taps opened, the tank never gets filled up. Which of the following can be the outlet flow rate in litres/min?

Q: Tap A can fill a tank in 20 hours, B in 25 hours but tap C can empty a full tank in 30 hours. Starting with A, followed by B and C each tap opens alternatively for one hour period till the tank gets filled up completely. In how many hours, the tank will be 96$\frac{2}{3}$% filled up?

Q: Pipes A, B, and C can fill a Full Tank in 24,36, and 48 Minutes respectively. All three Pipes are Opened simultaneously in a Tank that is already filled up to 1/6 of its capacity. A and B are opened for only the First 6 Minutes and closed thereafter. Then C alone filled the remaining Tank. Then in total how many Minutes does C fill the Tank?

Q: Tap A fills a tank in 40 minutes while tap C empties it at 13rd the rate at which A fills it. At 12 : 00 noon, A and C are simultaneously started and when the tank is 50% full, tap A is turned off. At what time will the tank be empty?

Q: In what time would a cistern be filled by three pipes which diameters are 2 cm, 3 cm and 4 cm running together when the largest alone can fill it in 58 minutes? The amount of water flowing in each pipe is proportional to the square of its diameter.

Q: Tap A can fill a tank in 20 hours, B in 25 hours but tap C can empty a full tank in 30 hours. Starting with A, followed by B and C each tap opens alternatively for one hour period till the tank gets filled up completely. In how many hour the tank will be filled up completely?

Q: There is a leak in the bottom of a cistern. When the cistern had no leak, it was filled in 2.5 hours. It now takes half an hour longer. If the cistern is full of water, then how long would it take to empty itself if water starts leaking out at double the usual rate once the cistern is half empty?

Q: There are three Taps A, B and C in a tank. They can fill the tank in 10 hrs, 20 hrs and 25 hrs respectively. At first, all of them are opened simultaneously. Then after 2 hours, tap C is closed and A and B are kept running. After the 4th hour, tap B is also closed. The remaining work is done by Tap A alone. Find the percentage of the work done by Tap A by itself.

Q: Two pipes A and B can separately fill a tank in 12 minutes and 15 minutes respectively. Both the pipes are opened together but after 4 minutes, pipe A is turned off. How much time will it take to fill the tank?

Q: A bath tub can be filled by the cold water pipe in 9 minutes and by the hot water pipe in 11.25 minutes. A person left the bathroom after turning on both the pipes simultaneously and returned at the moment when the bath tub should be full. Finding that the waste pipe had been left open, he closed it. In 3.75 minutes more, the bath tub was full. In what time would the waste pipe empty it?

Q: Two inlet pipes A and B together can fill a tank in ‘X’ minutes. If A and B take 81 minutes and 49 minutes more than ‘X’ minutes respectively, to fill the tank, then they can fill 5/7th of that tank in how many minutes?

Q: The capacity of a tank is 2400 m3. A pump can be used both for filling and emptying the tank. The emptying capacity of the pump is 10 m3/minute higher than its filling capacity. And also, the pump needs 8 minutes less to empty the tank than to fill it. Find the filling capacity of the pump.