MCQOPTIONS
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MCQOPTIONS
| 1. |
Two pipes A and B can fill a tank in 36 min. and 45 min. respectively. Another pipe C can empty the tank in 30 min. First A and B are opened. After 7 min. C is also opened. The tank is filled up in. |
| A. | 39 min. |
| B. | 46 min. |
| C. | 40 min. |
| D. | 45 min |
| Answer» C. 40 min. | |