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Basic Maths Data Intensity 4 :: Discussion
| 19. | A cistern has two taps which fill it in 12 min. and 15 min.respectively There is one outlet pipe in the cistern. When all the taps & pipe are opened, the empty cistern is full in 20 min. How long will the waste pipe (outlet) take to empty the full cistern ? | |
| A. | 10 min | |
| B. | 20 min | |
| C. | 30 min | |
| D. | 40 min | |
| Answer: Option A | |
| Explanation: | |
|
Work done by waste pipe in 1 minute |
|
| Tutorial Link: |
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