MCQOPTIONS
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| 1. |
Two pipes A and B can fill a tank in 15 hours and 20 hours respectively while a third pipe C can empty the full tank in 25 hours. All the three pipes are opened in the beginning. After 10 hours, C is |
| A. | 12 hrs |
| B. | 13 hrs |
| C. | 16 hrs |
| D. | 18 hrs |
| Answer» B. 13 hrs | |