| 1. | Tank is normally filled in 9 hours but takes four hours longer to fill because of a leak in its bottom. If the tank is full, the leak will empty it in ? | |
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32.5 hrs
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29.25 hrs
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30.30 hrs
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31 hrs
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Report Question| 2. | A cistern can be filled with water by a pipe in 5 hours and it can be emptied by a second pipe in 4 hours. If both the pipes are opened when the cistern is full, the time in which it will be emptied is ? | |
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9 hours
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18 hours
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20 hours
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20 and 1/2 hours
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| 3. | Two pipes can fill a tank in 15 hours and 20 hours respectively, while the third can empty it in 30 hours. If all the pipes are opened simultaneously, the empty tank will be filled in ? | |
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10 hours
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12 hours
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15 hours
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15 and 1/2 hours
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| 4. | Pipe A fills a tank in 30 minutes. Pipe B can fill the same tank 5 times as fast as pipe A. If both the pipes were kept open when the tank is empty, how much time will it take for the tank to overflow ? | |
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3 minutes
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2 minutes
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4 minutes
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5 minutes
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| 5. | 12 pumps working 6 hours a day can empty a completely filled reservoir in 15 days. How many such pumps working 9 hours a day will empty the same reservoir in 12 days ? | |
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15
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9
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10
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12
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| 6. | Two pipes A and B can separately fill a cistern in 60 min and 75 min respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, then the cistern is full in 50 min. In how much time, the third pipe alone can empty the cistern ? | |
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85 min
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95 min
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105 min
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100 min
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| 7. | 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 three pipes are simultaneously opened, then the cistern is full in 50 minutes. In how much time the third pipe alone can empty the cistern ? | |
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110 minutes
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100 minutes
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120 minutes
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90 minutes
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| 8. | One tap can fill a water tank in 40 minutes and another tap can make the filled tank empty in 60 minutes. If both the taps are open, in how many hours will the empty tank be filled ? | |
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2 hours
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2.5 hours
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3 hours
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3.5 hours
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| 9. | Two pipes, P and Q, together can fill a cistern in 20 minutes and P alone can in 30 minutes. Then Q alone can fill the cistern in ? | |
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62 minutes
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60 minutes
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61 minutes
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51 minutes
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| 10. | If 3/5 th of a cistern is filled in 1 minute, the time needed to fill the rest is ? | |
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40 sec
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30 sec
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36 sec
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24 sec
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