Three bells ring at 20 minutes, 30 minutes and 45 minutes intervals. After how much time will thee bells ring together?
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Answer:
3 hours
Step-by-step explanation:
the time after which they all will ring together will be their LCM
LCM of 45,30 and 20=180
therefore,
they will ring together after 180 minutes
which is 3 hours
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