Pipes and Cisterns Set 4

Hello Friends,

We are here with Set of questions related to pipes and cisterns which are important for aptitude section of SBI PO, SBI Clerk ,SSC CGL or other competitive exams.

Q1. A cistern can be filled with water by pipe A in 5 hours and it can be emptied by a second pipe B in 4 hours. If both the pipes are opened when the cistern is full, the time in which it will be emptied is:
(a) 25
(b) 20
(c) 16
(d) 18
(e) 28

Q2. A booster pump can be used for filling as well as for emptying a tank. The capacity of the tank is 2400 m³. The emptying capacity of the tank is 10 m³ per minute higher than its filling capacity and the pump needs 8 minutes lesser to empty the tank than it needs to fill it. What is the filling capacity of the pump (in m^3 per minute)?
(a) 54
(b) 60
(c) 50
(d) 45
(e) 65

Q3. Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is (in gallons):
(a) 105
(b) 110
(c) 140
(d) 120
(e) 125

Q4. Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How many time will be taken by A to fill the cistern separately?
(a) 4 hours
(b) 2 hours
(c) 6 hours
(d) 8 hours
(e) 10 hours

Q5. Three pipes A, B and C can fill together a tank in 6 hours. After working together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is:
(a) 20 hours
(b) 22 hours
(c) 24 hours
(d) 16 hours
(e) 18 hours