Three bells ring at intervals of 12 ,15 and 18 seconds respectively. if they starts ringing together at 8:35 a.m, at what time they ring together again at the earliest?
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Answer:
180 is common in 12, 15 and 18.
Explanation:
Therefore, LCM of 12, 15 and 18 is 180. Given : They started ringing together at 8:35 a.m. Second time they ringing together = 8:35 + 180 seconds = 8:35 + 3 minutes = 8.38 a.m
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