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

Question : 21 [SSC FCI Assistant Grade-III 2013]

Two pipes A and B can fill a cistern in 3 hours and 5 hours respectively. Pipe C can empty in 2 hours. If all the three pipes are open, in how many hours the cistern will be full?

a) 30 hours

b) can’t be filled

c) 10 hours

d) 15 hours

Question : 22 [SSC CGL Tier-II 2012]

A tank can be filled by pipe A in 2 hours and pipe B in 6 hours. At 10 A.M. pipe A was opened. At what time will the tank be filled if pipe B is opened at 11 A.M.?

a) 12 P.M.

b) 12.45 A.M.

c) 5 P.M

d) 11.45 A.M.

Question : 23 [SSC CGL Prelim 2000]

A tap can empty a tank in one hour. A second tap can empty it in 30 minutes. If both the taps operate simultaneously, how much time is needed to empty the tank?

a) 45 minutes

b) 20 minutes

c) 30 minutes

d) 40 minutes

Question : 24 [SSC CAPFs SI 2014]

A water tank can be filled by a tap in 30 minutes and another tap can fill it in 60 minutes. If both the taps are kept open for 5 minutes and then the first tap is closed, how long will it take for the tank to be full ?

a) 45 minutes

b) 20 minutes

c) 25 minutes

d) 30 minutes

Question : 25 [SSC CGL Prelim 2007]

A pipe can fill a tank in ‘x’ hours and another pipe can empty it in‘y’ (y > x) hours. If both the pipes are open, in how many hours will the tank be filled ?

a) ${xy}/{y - x}$ hours

b) (x - y) hours

c) (y - x) hours

d) ${xy}/{x - y}$ hours