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Basic Maths Data Intensity 2 :: Discussion
| 18. | wo pipes X and Y fill a tank in 15 hrs. and 20 hrs. respectively, while a third pipe ‘Z’ can empty the full tank in 25 hrs. All the three pipes are opened in the beginning. After 10 hrs. Z is closed. In how much time, will the tank be full ? | |
| A. | 12 hrs | |
| B. | 14 hrs | |
| C. | 16 hrs | |
| D. | 18 hrs | |
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