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? | MCQ Hive

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Q 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 A. 5 min
B B. 5.5 min
C C. 5.2 min
D D. None

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