Three bells ring at an interval of 10, 20 and 30 minutes respectively. If they all ring together at 8:30 p.m, at what time will they again r

Question

Three bells ring at an interval of 10, 20 and 30 minutes respectively. If they all ring together at 8:30 p.m, at what time will they again ring together? *

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Reagan 3 weeks 2021-10-04T14:31:18+00:00 1 Answer 0 views 0

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    2021-10-04T14:32:42+00:00

    Answer:

    we have to find ICM here

    10=2*5

    20=2*2*5

    30=2*3*5

    Lcm = 2*5*2*3

    =60 minutes

    means after one hour that is 9:30

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