three bells toll together at intervals of 5 and 10 and 15 minutes if they first toll together at 7:00 p.m. at what time will they toll together again also find out the bells with toll together at 8:20 p.m.
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Answer:
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Step-by-step explanation:
LCM of 5,10,15 is 30
So, after 30 minutes they toll again
The answer is 19:30 hours
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