Model 1 Basic Pipes & Cisterns problems Practice Questions Answers Test with Solutions & More Shortcuts

Question : 16 [SSC Constable (GD) 2013]

Three taps A, B, C can fill an overhead tank in 4, 6 and 12 hours respectively. How long would the three taps take to fill the tank if all of them are opened together ?

a) 5 hrs.

b) 2 hrs.

c) 4 hrs.

d) 3 hrs.

Question : 17

Two pipes A and B can separately fill a tank in 2 hours and 3 hours respectively. If both the pipes are opened simultaneously in the empty tank, then the tank will be filled in

a) 1 hour 20 minutes

b) 1 hour 12 minutes

c) 2 hours 30 minutes

d) 1 hour 15 minutes

Question : 18 [SSC CGL Tier-II 2015]

Pipe A can fill an empty tank in 6 hours and pipe B in 8 hours. If both the pipes are opened and after 2 hours pipe. A is closed, how much time B will take to fill the remaining tank?

a) 3$1/3$ hours

b) 7$1/2$ hours

c) 2$2/5$ hours

d) 2$1/3$ hours

Question : 19 [SSC CPO S.I.2003]

Two pipes A and B can fill a tank in 20 minutes and 30 minutes respectively. If both pipes are opened together, the time taken to fill the tank is :

a) 15 minutes

b) 50 minutes

c) 12 minutes

d) 25 minutes

Question : 20

One tap can fill a water tank in 40 minutes and another tap can make the filled tank empty in 60 minutes. If both the taps are open, in how many hours will the empty tank be filled ?

a) 3.5 hours

b) 2 hours

c) 2.5 hours

d) 3 hours