MCQOPTIONS
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| 1. |
Five bells first begin to toll together and then at intervals of 5, 10, 15, 20 and 25 seconds respectively. After what interval of time will they toll again together? |
| A. | 5 min |
| B. | 5.5 min |
| C. | 5.2 min |
| D. | None |
| Answer» B. 5.5 min | |