MCQOPTIONS
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| 1. |
Two pipes X and Y can fill up a tank in 32 minutes and 16 minutes respectively. If both the pipes are opened simultaneously, after how much time should Y be closed, so that the tank is full in 20 minutes? |
| A. | 6 minutes |
| B. | 10 minutes |
| C. | 4 minutes |
| D. | 8 minutes |
| Answer» B. 10 minutes | |