Q. Three bells toll at intervals of 9, 18 and 27 minutes respectively. If they start tolling together, after
what time will they next toll together?
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Three bells toll at intervals of 9, 18 and 27 minutes respectively.
LCM ( 9, 18, 27 )
LCM = 2×3×3×3 = 54 minutes
Time = 54/60 hours
= 9/10 hours
Hence , time will they next toll together is 9/10 hrs or
0.9 hours
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