Pipe and Cistern MCQ Set 1

PIPE AND CISTERN MCQ SET 1

1. Pipe L can fill a pool in 30 hours and pipe M in 45 hours . If both the pipes are opened in an empty pool , how much time will they take to fill it?

(a) 24 hrs.

(b) 17 hrs.

(c) 18 hrs.

(d) 20 hrs.

Show Answer

Answer: C

2. A tap can fill a tank in 4 hours . Another tap can fill the same in 6 hours . If both the taps are opened at the same time , then in how much time will the empty tank be filled completely?

(a) 3 hr

(b) 2 hr 24 min

(c) 2 hr 30 min

(d) 2 hr

Show Answer

Answer: B

3. Pipe A can fill 50% of the tank in 6 hours and pipe B can completely fill the same tank in 18 hours . If both the pipes are opened at the same time , in how much time (in minutes) will the empty tank be completely filled?

(a) 420

(b) 425

(c) 432

(d) 435

Show Answer

Answer: C

4. A pipe can fill an empty tank in 5 minutes and another pipe can empty it in 6 minutes . If both piped are opened simultaneously how long (in minutes) will it take to fill the empty tank?

(a) 33 min.

(b) 30 min.

(c) 35 min.

(d) 25 min.

Show Answer

Answer: B

5. A pipe can fill a tank in 30 hours . Due to a leakage at the bottom , it is filled in 50 hours . How much time will the leakage take to empty the completely filled tank?

(a) 60 hours

(b) 85 hours

(c) 70 hours

(d) 75 hours

Show Answer

Answer: D

6. A pipe can fill an overhead tank in 12 hours . But due to a leak at the bottom , it is filled in 18 hours . If the tank is full , how much time will the leak take to empty it?

(a) 3.6 hours

(b) 63 hours

(c) 7.2 hours

(d) 36 hours

Show Answer

Answer: D

7. A tap can fill a tank in 5 1/2 hours . Because of a leak , it took 8 1/4 hours to fill the tank . In how much time (in hours) will the leak alone empty 30% of the tank?

(a) 99/20

(b) 5/2

(c) 9/2

(d) 17/2

Show Answer

 Answer: A

8. Two pieces A and B can fill a tank in 48 minutes and 66 minutes , respectively . If both the pipes are opened simultaneously , then after how many minutes should pipe B be closed so that the tank gets filled in 32 minutes?

(a) 18

(b) 16

(c) 22

(d) 20

Show Answer

Answer: C

9. Pipe A can fill a tank in 16 minutes and pipe B empties it in 24 minutes . If both the pipes are opened together after how many minutes should B be closed , so that the tank is filled in 30 minutes?

(a) 21 minutes

(b) 20 minutes

(c) 18 minutes

(d) 15 minutes

Show Answer

Answer: A

10. P can fill a tank in 5 hours . Q can fill the same tank in 10 hours . R can empty the same tank in 20 hours . How much time will all the three take together to fill the tank ?

(a) 10 hours

(b) 4 hours

(c) 6 hours

(d) 5 hours

Show Answer

Answer: B