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.
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
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
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.
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
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
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
ย 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
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
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
Answer: B
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