| 1. | Three pipes A, B and C can fill a tank in 6 hours. After working together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is ? | |
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10
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12
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14
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16
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Report Question| 2. | A tap takes 36 hours extra to fill a tank due to a leakage equivalent to half of its inflow. The inflow can fill the tank in how many hours ? | |
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36 hrs
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24 hrs
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30 hrs
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18 hrs
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| 3. | 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 ? | |
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5 minutes
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10 minutes
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20 minutes
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80 minutes
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| 4. | One 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 in ? | |
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81 minutes
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108 minutes
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144 minutes
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192 minutes
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| 5. | A pipe can empty a tank in 40 minutes. A second pipe with diameter twice as much as that of the first is also attached with the tank to empty it. The two together can empty the tank in ? | |
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8 minutes
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13 and 1/3 minutes
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30 minutes
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38 minutes
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| 6. | A tap drips at a rate of one drop/ sec. 600 drops make 100ml. The number of litres wasted in 300 days is ? | |
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4320000
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432000
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43200
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4320
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| 7. | Two pipes can fill a tank with water in 15 and 12 hours respectively and a third pipe can empty it in 4 hours. If the pipes be opened in order at 8, 9 and 11 a.m. respectively, the tank will be emptied at ? | |
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11 : 40 a.m.
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12 : 40 p.m.
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1 : 40 p.m.
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2 : 40 p.m.
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| 8. | Two pipes can independently fill a bucket in 20 minutes and 25 minutes. Both are opened together for 5 minutes after which the second pipe is turned off. What is the time taken by the first pipe alone to fill the remaining portion of the bucket ? | |
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11 minutes
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16 minutes
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20 minutes
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15 minutes
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| 9. | A pipe can fill a tank in ‘x’ hours and another pipe can empty it in‘y’ (y > x) hours. If both the pipes are open, in how many hours will the tank be filled ? | |
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(x – y) hours
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(y – x) hours
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xy/x - y hours
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xy/y - x hours
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| 10. | Two pipes X and Y can fill a cistern in 24 minutes and 32 minutes respectively. If both the pipes are opened together, then after how much time (in minutes) should Y be closed so that the tank is full in 18 minutes ? | |
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10
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8
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6
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5
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