Five bells begin to toll together and toll respectively at intervals o – McqOptions

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1.	Five bells begin to toll together and toll respectively at intervals of 6, 7, 8, 9 and 12 seconds. After how many seconds will they toll together again ?
A.	72 sec
B.	612 sec
C.	504 sec
D.	318 sec
Answer» B. 612 sec

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