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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Three pipes A, B and C can fill cistern in 6 hours. After working at it together for 2 hours, C is closed and A and B fill it in 7 hours more. The time taken by C alone to fill the cistern is1). 14 hours2). 15 hours3). 16 hours4). 17 hours |
| Answer» RIGHT ANSWER is 14 HOURS | |
| 52. |
A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely 1). 4 hours2). 4 hours 15 minutes3). 3 hours 15 minutes4). 3 hours 45 minutes |
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Answer» it from previous YEAR ssc papers, OPTION 4 is the RIGHT answer |
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| 53. |
Three taps A, B and C can fill a tank in 12, 15 and 20 hours respectively. If A is open all the time and B and C are open for one hour each alternatively, the tank will be full in :1). 6 hours2). $6\frac{1}{2}$ hours3). 7 hours4). $7\frac{1}{2}$ hours |
| Answer» CORRECT ANSWER is: OPTION 3 | |
| 54. |
Onc Pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, the slower Pipe alone will be able to fill the tank in1). 81 minutes2). 108 minutes3). 144 minutes4). 92 minutes |
| Answer» 108 MINUTES SEEMS CORRECT. | |
| 55. |
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 tank1). 20 minutes2). 30 minutes3). 40 minutes4). 45 minutes |
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Answer» Let the AMOUNT of water in the TANK is 2 UNITS Tap A can empty it in 1 hour hence in 1 hour it will remove 2 units out of it. Tap B can empty it in 30 mins hence in 1 hour it will remove 4 units. Hence if both taps are opned tank they can take 6 units of water out in 1 hour. But Tank has only 2 units of water Hence it can be empty in 2 / 6 Hours = 1/3 hours Hence 20 mins |
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| 56. |
Three pipes P, Q and R can separately fill a cistern in 4,8 and 12 hours respectively. Another pipe S can empty the completely filled cistern in 10 hours. Which of the following arrangements will fill the empty cistern in less time than others 1). Q alone is open2). P and S are open3). P,R and S are open4). P,Q and S are open |
| Answer» | |
| 57. |
A tank is fitted with two taps.The first tap can fill the tank completely in 45 minutes and the second tap can empty the full tank in one hour. If both the taps are opened alternately for one minute, then in how many hours the empty tank will be filled com- pletely1). 2 hours 55 minutes2). 3 hours 40 minutes3). 4 hours 48 minutes4). 5 hours 53 minutes |
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Answer» This QUESTION was asked some where in previous year papers of ssc, and CORRECT ANSWER was option 4 |
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| 58. |
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.1). 12.45 A.M2). 5 P.M3). 11.45 A.M4). 12 P.M |
| Answer» | |
| 59. |
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 in1). 1 hour 12 minutes2). 2 hours 30 minutes3). 1 hour 15 minutes4). 1 hour 20 minutes |
| Answer» 1 HOUR 12 MINUTES : - OPTION 1 | |
| 60. |
Two pipes, P and Q can fill a cistern in 12 and 15 minutes respectively. Both are opened together, but at the end of 3 minutes. P is turned off. in how many more minutes will Q fill the cistern 1). 7 minutes2). $7\frac{1}{2}$ minutes3). 8 minutes4). $8\frac{1}{4}$ minutes |
| Answer» | |
| 61. |
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 full1). can't be filled2). 10 hours3). 15 hours4). 30 hours |
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Answer» This question was ASKED some where in PREVIOUS YEAR papers of ssc, and correct answer was 30 hours |
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| 62. |
12 pumps working 6 hours a day can empty a completely filled reservoir in 15 days. How many such pumps working 9 hours day will empty the same reservoir in 12 days 1). 152). 93). 104). 12 |
| Answer» 1012*6*15/1=P*9*12/1P=10 | |
| 63. |
A pipe of diameter d can drain a certain water tank in 40 minutes. The time taken by a pipe of diameter 2d for doing the same job in :1). 5 minutes2). 10 minutes3). 20 minutes4). 80 minutes |
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Answer» Time is inversely PROPORTIONAL to the square of diameter. So,$ \frac{t1}{T2} = \frac{(D2)^2}{(d1)^2} $$\frac{40}{t2} = \frac{(2d)^2}{(d)^2}$Solve, t2 = $10$ MINS |
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| 64. |
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 1). 20 minutes2). 25 minutes3). 30 minutes4). 45 minutes |
| Answer» 45 MINUTES : - is CORRECT HENCE OPTION 4 | |
| 65. |
A tap drips at a rate of one drop/ sec, 600 drops make 100ml. The number of litres wasted in 300 days is1). 4320002). 4320003). 432004). 4320 |
| Answer» | |
| 66. |
Having the same capacity 9 taps fill up a water tank in 20 minutes. How many taps of the same capacity are required to fill up the same water tank in 15 minutes1). 102). 123). 154). 18 |
| Answer» | |
| 67. |
A tap can empty a tank in 30 minutes. A second tap can empty it in 45 minutes. If both the taps operate simultaneously, how much time is needed to empty the tank1). 30 minutes2). 18 minutes3). 14 minutes4). 15 minutes |
| Answer» OPTION 2 is the RIGHT ANSWER | |
| 68. |
Which of these pipes will empty a pool the fastest (i) One pipe of diameter 60 cm (ii) Two pipes of diameter 30 cm each (iii) three pipes of diameter 20 cm each1). (i)2). (iii)3). (ii)4). None of these |
| Answer» OPTION 1 : (i) is CORRECT | |