four balls toll at interval of 8,9,12 and 15 minutes respectively. if they toll together at 3 pm when will they toll together next
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LCM of 8 9 12 and 15=360=6hrs
3+6=9:00pm
so,it will ring again at 9:00pm
3+6=9:00pm
so,it will ring again at 9:00pm
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