Maths Questions and Answers for Bank Exams

Mathematical Question-Answers for Competitive Exams

Pipe and Cistern :

Q.26. A Cistern can be filled by a tap in 4 hours while it can be emptied by another tap in 9 hours. If both the taps are opened simultaneously then after how much time will the cistern get filled?

(A) 2.5 hrs

(B) 3 hrs

(C) 6.5 hrs

(D) 7.2 hrs

Q.27. A tap can fill a tank in 6 hours. After the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?

(A) 2 hrs

(B) 3 hrs 45 min

(C) 4 hrs

(D) 5 hrs 15.

Q.28. A water tank is two-fifth full. Pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely?

(A) 6 min to empty

(B) 6 min to fill

(C) 8min to empty

(D) 8 min to fill

(E) None of these

Q.29. Pipe A can fill a tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours. If all the pipes are open, in how many hours will the tank be filled?

(A) 1

(B) 2.5

(C) 3

(D) 3.5

Q.30. Two pipes A and B can separately fill a cistern in 60 minutes and 75 minutes respectively. There is a third pipe in the bottom of the cistern to empty it. If all the tree pipes are simultaneously opened, then the cistern is full in 50 minutes. In how much time the third pipe alone can empty the cistern?

(A) 80 min

(B) 100 min

(C) 110 min

(D) 120 min

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